diff --git a/qlib/__init__.py b/qlib/__init__.py
index 8d0b322b1..f2b2c28ac 100644
--- a/qlib/__init__.py
+++ b/qlib/__init__.py
@@ -13,7 +13,7 @@ import platform
 import yaml
 from pathlib import Path
 
-from .utils import can_use_cache
+from .utils import can_use_cache, init_instance_by_config, get_module_by_module_path
 
 
 # init qlib
@@ -22,6 +22,7 @@ def init(default_conf="client", **kwargs):
     from .data.data import register_all_wrappers
     from .log import get_module_logger, set_log_with_config
     from .data.cache import H
+    from .workflow import R, QlibRecorder
 
     C.reset()
     H.clear()
@@ -79,6 +80,15 @@ def init(default_conf="client", **kwargs):
 
     if "flask_server" in C:
         LOG.info(f"flask_server={C['flask_server']}, flask_port={C['flask_port']}")
+    
+    # set up QlibRecorder
+    default_uri = str(Path(os.getcwd()).resolve() / "mlruns")
+    current_uri = C['exp_uri'] if C['exp_uri'] is not None else default_uri
+    # exp manager module
+    module = get_module_by_module_path('qlib.workflow')
+    exp_manager = init_instance_by_config(C['exp_manager'], module)
+    qr = QlibRecorder(exp_manager, default_uri, current_uri)
+    R.register(qr)
 
 
 def _mount_nfs_uri(C):
diff --git a/qlib/config.py b/qlib/config.py
index ff01fe5e8..db5fab69c 100644
--- a/qlib/config.py
+++ b/qlib/config.py
@@ -124,6 +124,12 @@ _default_config = {
         },
         "loggers": {"qlib": {"level": "DEBUG", "handlers": ["console"]}},
     },
+    # Defatult config for experiment manager
+    "exp_manager": {
+        "class": "MLflowExpManager",
+        "kwargs": {}
+    },
+    "exp_uri": None,
 }
 
 MODE_CONF = {
diff --git a/qlib/data/data.py b/qlib/data/data.py
index c41d32f6e..476cc9682 100644
--- a/qlib/data/data.py
+++ b/qlib/data/data.py
@@ -24,6 +24,7 @@ from ..log import get_module_logger
 from ..utils import parse_field, read_bin, hash_args, normalize_cache_fields
 from .base import Feature
 from .cache import DiskDatasetCache, DiskExpressionCache
+from ..utils import Wrapper, get_provider_obj, register_wrapper
 
 
 class CalendarProvider(abc.ABC):
@@ -1019,44 +1020,6 @@ class ClientProvider(BaseProvider):
             DatasetD.set_conn(self.client)
 
 
-class Wrapper(object):
-    """Data Provider Wrapper"""
-
-    def __init__(self):
-        self._provider = None
-
-    def register(self, provider):
-        self._provider = provider
-
-    def __getattr__(self, key):
-        if self._provider is None:
-            raise AttributeError("Please run qlib.init() first using qlib")
-        return getattr(self._provider, key)
-
-
-def get_cls_from_name(cls_name):
-    return getattr(importlib.import_module(".data", package="qlib"), cls_name)
-
-
-def get_provider_obj(config, **params):
-    if isinstance(config, dict):
-        params.update(config["kwargs"])
-        config = config["class"]
-    return get_cls_from_name(config)(**params)
-
-
-def register_wrapper(wrapper, cls_or_obj):
-    """register_wrapper
-
-    :param wrapper: A wrapper of all kinds of providers
-    :param cls_or_obj:  A class or class name or object instance in data/data.py
-    """
-    if isinstance(cls_or_obj, str):
-        cls_or_obj = get_cls_from_name(cls_or_obj)
-    obj = cls_or_obj() if isinstance(cls_or_obj, type) else cls_or_obj
-    wrapper.register(obj)
-
-
 Cal = Wrapper()
 Inst = Wrapper()
 FeatureD = Wrapper()
diff --git a/qlib/utils/__init__.py b/qlib/utils/__init__.py
index b10735868..8467db600 100644
--- a/qlib/utils/__init__.py
+++ b/qlib/utils/__init__.py
@@ -611,3 +611,39 @@ def exists_qlib_data(qlib_dir):
         return False
 
     return True
+
+
+#################### Wrapper #####################
+class Wrapper(object):
+    """Data Provider Wrapper"""
+
+    def __init__(self):
+        self._provider = None
+
+    def register(self, provider):
+        self._provider = provider
+
+    def __getattr__(self, key):
+        if self._provider is None:
+            raise AttributeError("Please run qlib.init() first using qlib")
+        return getattr(self._provider, key)
+
+
+def get_provider_obj(config, **params):
+    module = get_module_by_module_path("qlib.data")
+    klass, kwargs = get_cls_kwargs(config, module)
+    kwargs.update(params)
+    return klass(**kwargs)
+
+
+def register_wrapper(wrapper, cls_or_obj):
+    """register_wrapper
+
+    :param wrapper: A wrapper of all kinds of providers
+    :param cls_or_obj:  A class or class name or object instance in data/data.py
+    """
+    if isinstance(cls_or_obj, str):
+        module = get_module_by_module_path("qlib.data")
+        cls_or_obj = getattr(module, cls_or_obj)
+    obj = cls_or_obj() if isinstance(cls_or_obj, type) else cls_or_obj
+    wrapper.register(obj)
\ No newline at end of file
diff --git a/qlib/workflow/__init__.py b/qlib/workflow/__init__.py
index 76d5e7d4c..db5112470 100644
--- a/qlib/workflow/__init__.py
+++ b/qlib/workflow/__init__.py
@@ -2,156 +2,62 @@
 # Licensed under the MIT License.
 
 from contextlib import contextmanager
-from .record import MLflowRecorder
-from .exp import MLflowExpManager
+from .expm import *
+from ..utils import Wrapper
 
-class Record:
-    def __init__(self):
-        pass
+class QlibRecorder:
+    def __init__(self, exp_manager, default_uri, current_uri):
+        self.exp_manager = exp_manager
+        self.default_uri = default_uri
+        self.current_uri = current_uri
 
     @contextmanager
-    def start_exp(self, experiment_name=None, uri=None, project_path=None, artifact_location=None, nested=False):
-        raise NotImplementedError(f"Please implement the `start_exp` method.")
+    def start(self, experiment_name):
+        run = self.start_exp(experiment_name, self.current_uri)
+        yield run
+        self.end_exp()
     
-    def search_runs(self, experiment_ids=None, filter_string='', run_view_type=1, max_results=100000, order_by=None):
-        raise NotImplementedError(f"Please implement the `search_runs` method.")
+    def start_exp(self, experiment_name=None):
+        return self.exp_manager.start_exp(experiment_name, self.current_uri) 
+
+    def end_exp(self):
+        self.exp_manager.end_exp()
     
-    def get_exp(self, experiment_id):
-        raise NotImplementedError(f"Please implement the `get_exp` method.")
-
-    def get_exp_by_name(self, experiment_name):
-        raise NotImplementedError(f"Please implement the `get_exp_by_name` method.")
+    def search_records(self, experiment_ids, **kwargs):
+        return self.exp_manager.search_records(experiment_ids, **kwargs)
     
-    def create_exp(self, experiment_name, artifact_location=None):
-        raise NotImplementedError(f"Please implement the `create_exp` method.")
-    
-    def set_exp(self, experiment_name):
-        raise NotImplementedError(f"Please implement the `set_exp` method.")
-
-    def delete_exp(self, experiment_id):
-        raise NotImplementedError(f"Please implement the `create_exp` method.")
-
-    def set_tracking_uri(self, uri):
-        raise NotImplementedError(f"Please implement the `set_tracking_uri` method.")
-    
-    def get_tracking_uri(self):
-        raise NotImplementedError(f"Please implement the `get_tracking_uri` method.")
-    
-    def get_recorder(self):
-        raise NotImplementedError(f"Please implement the `get_recorder` method.")
-
-    def save_object(self, name, data):
-        raise NotImplementedError(f"Please implement the `save_object` method.")
-
-    def save_objects(self, name_data_list):
-        raise NotImplementedError(f"Please implement the `save_objects` method.")
-
-    def load_object(self, name):
-        raise NotImplementedError(f"Please implement the `load_object` method.")
-    
-    def log_param(self, key, value):
-        raise NotImplementedError(f"Please implement the `log_param` method.")
-
-    def log_params(self, params):
-        raise NotImplementedError(f"Please implement the `log_params` method.")
-
-    def log_metric(self, key, value, step=None):
-        raise NotImplementedError(f"Please implement the `log_metric` method.")
-
-    def log_metrics(self, metrics, step=None):
-        raise NotImplementedError(f"Please implement the `log_metrics` method.")
-    
-    def set_tag(self, key, value):
-        raise NotImplementedError(f"Please implement the `set_tag` method.")
-
-    def set_tags(self, tags):
-        raise NotImplementedError(f"Please implement the `log_tags` method.")
-
-    def delete_tag(self, key):
-        raise NotImplementedError(f"Please implement the `delete_tag` method.")
-    
-    def log_artifact(self, local_path, artifact_path=None):
-        raise NotImplementedError(f"Please implement the `log_artifact` method.")
-
-    def log_artifacts(self, local_dir, artifact_path=None):
-        raise NotImplementedError(f"Please implement the `log_artifacts` method.")
-
-    def get_artifact_uri(self, artifact_path=None):
-        raise NotImplementedError(f"Please implement the `get_artifact_uri` method.")
-
-class MLflowRecord(Record):
-    def __init__(self):
-        self.exp_manager = MLflowExpManager()
-
-    @contextmanager
-    def start_exp(self, experiment_name=None, uri=None, project_path=None, artifact_location=None, nested=False):
-        yield self.exp_manager.start_exp(experiment_name, uri, project_path, artifact_location, nested)
-    
-    def search_runs(self, experiment_ids=None, filter_string='', run_view_type=1, max_results=100000, order_by=None):
-        return self.exp_manager.search_runs(experiment_ids, filter_string, run_view_type, max_results, order_by)
-    
-    def get_exp(self, experiment_id):
-        return self.exp_manager.get_exp(experiment_id)
-
-    def get_exp_by_name(self, experiment_name):
-        return self.exp_manager.get_exp_by_name(experiment_name)
-    
-    def create_exp(self, experiment_name, artifact_location=None):
-        self.exp_manager.create_exp(experiment_name, artifact_location)
-    
-    def set_exp(self, experiment_name):
-        self.exp_manager.set_exp(experiment_name)
+    def get_exp(self, experiment_id=None, experiment_name=None):
+        return self.exp_manager.get_exp(experiment_id, experiment_name)
 
     def delete_exp(self, experiment_id):
         self.exp_manager.delete_exp(experiment_id)
 
-    def set_tracking_uri(self, uri):
-        self.exp_manager.set_tracking_uri(uri)
-    
-    def get_tracking_uri(self):
-        return self.exp_manager.get_tracking_uri()
-    
+    def get_uri(self, type):
+        return self.exp_manager.get_uri(type)
+
     def get_recorder(self):
-        return self.exp_manager.get_recorder()
+        return self.exp_manager.active_recorder
 
-    def save_object(self, name, data):
-        self.exp_manager.active_recorder.save_object(name, data)
+    def save_object(self, data=None, name=None, local_path=None):
+        self.exp_manager.active_recorder.save_object(data, name, local_path)
 
-    def save_objects(self, name_data_list):
-        self.exp_manager.active_recorder.save_objects(name_data_list)
+    def save_objects(self, data_name_list=None, local_path=None):
+        self.exp_manager.active_recorder.save_objects(data_name_list, local_path)
 
     def load_object(self, name):
         return self.exp_manager.active_recorder.load_object(name)
+
+    def log_params(self, **kwargs):
+        self.exp_manager.active_recorder.log_params(**kwargs)
+
+    def log_metrics(self, step=None, **kwargs):
+        self.exp_manager.active_recorder.log_metrics(step, **kwargs)
     
-    def log_param(self, key, value):
-        self.exp_manager.active_recorder.log_param(key, value)
-
-    def log_params(self, params):
-        self.exp_manager.active_recorder.log_params(params)
-
-    def log_metric(self, key, value, step=None):
-        self.exp_manager.active_recorder.log_metric(key, value, step)
-
-    def log_metrics(self, metrics, step=None):
-        self.exp_manager.active_recorder.log_metrics(metrics, step)
-    
-    def set_tag(self, key, value):
-        self.exp_manager.active_recorder.set_tag(key, value)
-
-    def set_tags(self, tags):
-        self.exp_manager.active_recorder.set_tags(tags)
+    def set_tags(self, **kwargs):
+        self.exp_manager.active_recorder.set_tags(**kwargs)
 
     def delete_tag(self, key):
         self.exp_manager.active_recorder.delete_tag(key)
-    
-    def log_artifact(self, local_path, artifact_path=None):
-        self.exp_manager.active_recorder.log_artifact(local_path, artifact_path)
-
-    def log_artifacts(self, local_dir, artifact_path=None):
-        self.exp_manager.active_recorder.log_artifacts(local_dir, artifact_path)
-
-    def get_artifact_uri(self, artifact_path=None):
-        return self.exp_manager.active_recorder.get_artifact_uri(artifact_path)
 
 # global record
-R = MLflowRecord()
\ No newline at end of file
+R = Wrapper()
\ No newline at end of file
diff --git a/qlib/workflow/exp.py b/qlib/workflow/exp.py
index f3cedea90..9e076aced 100644
--- a/qlib/workflow/exp.py
+++ b/qlib/workflow/exp.py
@@ -2,67 +2,23 @@
 # Licensed under the MIT License.
 
 import mlflow
-from contextlib import contextmanager
-from .record import MLflowRecorder
+from pathlib import Path
 
-class ExpManager:
+class Experiment:
     """
-    This is the `ExpManager` class for managing the experiments. The API is designed similar to mlflow.
-    (The link: https://mlflow.org/docs/latest/python_api/mlflow.html)
+    Thie is the `Experiment` class for each experiment being run. The API is designed 
     """
     def __init__(self):
-        self.active_recorder = None
-        self.experiments = dict() # store the experiment names -> list of recorders.
-        self.exp_ids = list()
-    
-    def _store_exp(self, id, name):
-        """
-        Store the experiments in the experiments holder.
-        """
-        if id in self.exp_ids:
-            raise Exception('Something went wrong when creating the experiment. Please check if the experiment is already created.')
-        if name in self.experiments:
-            assert int(id) == int(self.experiments[name][0]), 'Experiment id and name are not consistent when storing the experiment.'
-        else:
-            self.exp_ids.append(id)
-            self.experiments[name] = [id]
+        self.name = None
+        self.id = None
+        self.recorders = list()
 
-    def start_exp(self, project_path, experiment_name=None, uri=None, artifact_location=None, nested=False):
+    def search_records(self, **kwargs):
         """
-        Start running an experiment. This method can only work in the `with` statement.
+        Get a pandas DataFrame of records that fit the search criteria of the experiment.
 
         Parameters
         ----------
-        project_path : str
-            path for the project.
-        experiment_name : str
-            name of the active experiment.
-        uri : str
-            the current tracking URI.
-        artifact_location : str
-            the location to store all the artifacts.
-        nested : boolean
-            controls whether run is nested in parent run.
-
-        Returns
-        None
-        """
-        raise NotImplementedError(f"Please implement the `start_exp` method.")
-    
-    def end_exp(self):
-        """
-        End an active experiment.
-        """
-        raise NotImplementedError(f"Please implement the `end_exp` method.")
-    
-    def search_runs(self, experiment_ids=None, filter_string='', run_view_type=1, max_results=100000, order_by=None):
-        """
-        Get a pandas DataFrame of runs that fit the search criteria.
-
-        Parameters
-        ----------
-        experiment_ids : list
-            list of experiment IDs.
         filter_string : str
             filter query string, defaults to searching all runs.
         run_view_type : int
@@ -74,192 +30,18 @@ class ExpManager:
 
         Returns
         -------
-        A pandas.DataFrame of runs.
+        A pandas.DataFrame of records.
         """
-        raise NotImplementedError(f"Please implement the `search_runs` method.")
-    
-    def get_exp(self, experiment_id):
-        """
-        Retrieve an experiment by experiment_id from the backend store.
-
-        Parameters
-        ----------
-        experiment_id : str
-            the experiment id to return.
-
-        Returns
-        -------
-        An experiment object (e.g. mlflow.entities.Experiment).
-        """
-        raise NotImplementedError(f"Please implement the `get_exp` method.")
-
-    def get_exp_by_name(self, experiment_name):
-        """
-        Retrieve an experiment by experiment name from the backend store.
-
-        Parameters
-        ----------
-        experiment_name : str
-            the experiment name to return.
-
-        Returns
-        -------
-        An experiment object (e.g. mlflow.entities.Experiment).
-        """
-        raise NotImplementedError(f"Please implement the `get_exp_by_name` method.")
-    
-    def create_exp(self, experiment_name, artifact_location=None):
-        """
-        Create an experiment.
-
-        Parameters
-        ----------
-        experiment_name : str
-            the experiment name, which must be unique.
-        artifact_location : str
-            the location to store run artifacts.
-
-        Returns
-        -------
-        String id of created experiment.
-        """
-        raise NotImplementedError(f"Please implement the `create_exp` method.")
-    
-    def set_exp(self, experiment_name):
-        """
-        Set the experiment to be active.
-
-        Parameters
-        ----------
-        experiment_name : str
-            the experiment name, which must be unique.
-
-        Returns
-        -------
-        String id of created experiment.
-        """
-        raise NotImplementedError(f"Please implement the `set_exp` method.")
-
-    def delete_exp(self, experiment_id):
-        """
-        Delete an experiment.
-
-        Parameters
-        ----------
-        experiment_id  : str
-            the experiment id.  
-
-        Returns
-        -------
-        None
-        """
-        raise NotImplementedError(f"Please implement the `create_exp` method.")
-
-    def set_tracking_uri(self, uri):
-        """
-        Set the tracking server URI.
-
-        Parameters
-        ----------
-        uri : str
-            the uri of the tracking server, can be An empty string, or a local file path, prefixed with file:/.
-            or An HTTP URI or A Databricks workspace.
-        Returns
-        -------
-        None
-        """
-        raise NotImplementedError(f"Please implement the `set_tracking_uri` method.")
-    
-    def get_tracking_uri(self):
-        """
-        Get the tracking server URI.
-
-        Parameters
-        ----------
-
-        Returns
-        -------
-        The tracking URI.
-        """
-        raise NotImplementedError(f"Please implement the `get_tracking_uri` method.")
-    
-    def get_recorder(self):
-        """
-        Get the current active Recorder.
-
-        Parameters
-        ----------
-
-        Returns
-        -------
-        An Recorder object.
-        """
-        raise NotImplementedError(f"Please implement the `get_recorder` method.")
+        raise NotImplementedError(f"Please implement the `search_records` method.")
 
 
-class MLflowExpManager(ExpManager):
-    '''
-    Use mlflow to implement ExpManager.
-    '''
-    def start_exp(self, experiment_name=None, uri=None, project_path=None, artifact_location=None, nested=False):
-        # set the tracking uri
-        if uri is None:
-            assert project_path is not None, "Please provide the project_path if no uri is provided in order to set a proper tracking uri."
-            print('No tracking URI is provided. The default tracking URI is set as `mlruns` under the project path.')
-            mlflow.set_tracking_uri(str(project_path / "mlruns"))
-        else:
-            mlflow.set_tracking_uri(uri)
-        # start the experiment
-        if experiment_name is None:
-            print('No experiment name provided. The default experiment name is set as `experiment`.')
-            experiment_id = self.create_exp('experiment', artifact_location)
-            # set the active experiment
-            self.set_exp('experiment')
-            experiment_name = 'experiment'
-        else:
-            if experiment_name not in self.experiments:
-                if self.get_exp_by_name(experiment_name) is not None:
-                    raise Exception('The experiment has already been created before. Please pick another name or delete the files under tracking uri.')
-                experiment_id = self.create_exp(experiment_name, artifact_location)
-            else:
-                experiment_id = self.experiments(experiment_name)[0]
-            # set the active experiment
-            self.set_exp(experiment_name)
-
-        # store the id and name
-        self._store_exp(experiment_id, experiment_name)
-        # set up recorder
-        recorder = MLflowRecorder(experiment_id)
-        self.active_recorder = recorder
-        # store the recorder
-        self.experiments[experiment_name].append(self.active_recorder)
-
-        return self.active_recorder.start_run(experiment_id=experiment_id, nested=nested)
-
-    def search_runs(self, experiment_ids=None, filter_string='', run_view_type=1, max_results=100000, order_by=None):
-        return mlflow.search_runs(experiment_ids, filter_string, run_view_type, max_results, order_by)
-    
-    def get_exp(self, experiment_id):
-        return mlflow.get_experiment(experiment_id)
-
-    def get_exp_by_name(self, experiment_name):
-        return mlflow.get_experiment_by_name(experiment_name)
-
-    def create_exp(self, experiment_name, artifact_location=None):
-        return mlflow.create_experiment(experiment_name, artifact_location)
-
-    def set_exp(self, experiment_name):
-        mlflow.set_experiment(experiment_name)
-
-    def delete_exp(self, experiment_id):
-        mlflow.delete_experiment(experiment_id)
-        self.experiments = {key:val for key, val in self.experiments.items() if val[0] != experiment_id}
-
-    def set_tracking_uri(self, uri):
-        mlflow.set_tracking_uri(uri)
-    
-    def get_tracking_uri(self):
-        return mlflow.get_tracking_uri()
-    
-    def get_recorder(self):
-        return self.active_recorder
\ No newline at end of file
+class MLflowExperiment(Experiment):
+    """
+    Use mlflow to implement Experiment.
+    """
+    def search_records(self, **kwargs):
+        filter_string = '' if kwargs.get('filter_string') is None else kwargs.get('filter_string')
+        run_view_type = 1 if kwargs.get('run_view_type') is None else kwargs.get('run_view_type')
+        max_results = 100000 if kwargs.get('max_results') is None else kwargs.get('max_results')
+        order_by = kwargs.get('order_by')
+        return mlflow.search_runs([self.experiment_id], filter_string, run_view_type, max_results, order_by)
\ No newline at end of file
diff --git a/qlib/workflow/expm.py b/qlib/workflow/expm.py
new file mode 100644
index 000000000..36a945f42
--- /dev/null
+++ b/qlib/workflow/expm.py
@@ -0,0 +1,236 @@
+# Copyright (c) Microsoft Corporation.
+# Licensed under the MIT License.
+
+import mlflow
+import os
+from pathlib import Path
+from contextlib import contextmanager
+from .exp import MLflowExperiment
+from .record import MLflowRecorder
+
+class ExpManager:
+    """
+    This is the `ExpManager` class for managing the experiments. The API is designed similar to mlflow.
+    (The link: https://mlflow.org/docs/latest/python_api/mlflow.html)
+    """
+    def __init__(self):
+        self.default_uri = None
+        self.active_recorder = None # only one recorder can running each time
+        self.experiments = dict() # store the experiment name --> Experiment object
+
+    def start_exp(self, experiment_name=None, uri=None, **kwargs):
+        """
+        Start running an experiment.
+
+        Parameters
+        ----------
+        experiment_name : str
+            name of the active experiment.
+        uri : str
+            the current tracking URI.
+        artifact_location : str
+            the location to store all the artifacts.
+        nested : boolean
+            controls whether run is nested in parent run.
+
+        Returns
+        An object wrapped by context manager.
+        """
+        raise NotImplementedError(f"Please implement the `start_exp` method.")
+
+    def end_exp(self, **kwargs):
+        """
+        End an running experiment.
+
+        Parameters
+        ----------
+        experiment_name : str
+            name of the active experiment.
+        """
+        raise NotImplementedError(f"Please implement the `end_exp` method.")
+
+    def search_records(self, experiment_ids=None, **kwargs):
+        """
+        Get a pandas DataFrame of records that fit the search criteria.
+
+        Parameters
+        ----------
+        experiment_ids : list
+            list of experiment IDs.
+        filter_string : str
+            filter query string, defaults to searching all runs.
+        run_view_type : int
+            one of enum values ACTIVE_ONLY, DELETED_ONLY, or ALL (e.g. in mlflow.entities.ViewType).
+        max_results  : int
+            the maximum number of runs to put in the dataframe.
+        order_by : list
+            list of columns to order by (e.g., “metrics.rmse”).
+
+        Returns
+        -------
+        A pandas.DataFrame of runs.
+        """
+        raise NotImplementedError(f"Please implement the `search_records` method.")
+
+    def __create_exp(self, experiment_name, artifact_location=None):
+        """
+        Create an experiment.
+
+        Parameters
+        ----------
+        experiment_name : str
+            the experiment name, which must be unique.
+        artifact_location : str
+            the location to store run artifacts.
+
+        Returns
+        -------
+        An experiment object.
+        """
+        raise NotImplementedError(f"Please implement the `create_exp` method.")
+    
+    def get_exp(self, experiment_id=None, experiment_name=None):
+        """
+        Retrieve an experiment by experiment_id from the backend store.
+
+        Parameters
+        ----------
+        experiment_id : str
+            the experiment id to return.
+
+        Returns
+        -------
+        An experiment object.
+        """
+        raise NotImplementedError(f"Please implement the `get_exp` method.")
+
+    def delete_exp(self, experiment_id):
+        """
+        Delete an experiment.
+
+        Parameters
+        ----------
+        experiment_id  : str
+            the experiment id.  
+        """
+        raise NotImplementedError(f"Please implement the `create_exp` method.")
+
+    def get_uri(self, type):
+        """
+        Get the default tracking URI or current URI.
+
+        Parameters
+        ----------
+        type  : str
+            the type of the tracking URI one wants to retrieve.
+
+        Returns
+        -------
+        The tracking URI string.
+        """
+        raise NotImplementedError(f"Please implement the `create_exp` method.")
+
+    def get_recorder(self):
+        """
+        Get the current active Recorder.
+
+        Parameters
+        ----------
+
+        Returns
+        -------
+        An Recorder object.
+        """
+        raise NotImplementedError(f"Please implement the `get_recorder` method.")
+        
+
+class MLflowExpManager(ExpManager):
+    '''
+    Use mlflow to implement ExpManager.
+    '''
+    def __init__(self):
+        super(MLflowExpManager, self).__init__()
+        self.default_uri = None
+        self.current_uri = None
+
+    def start_exp(self, experiment_name=None, uri=None):
+        # create experiment
+        experiment = self.__create_exp(experiment_name, uri)
+        # set up recorder
+        recorder = MLflowRecorder(experiment.id)
+        self.active_recorder = recorder
+        # store the recorder
+        experiment.recorders.append(self.active_recorder)
+        # store the experiment
+        self.experiments[experiment_name] = experiment
+
+        return self.active_recorder.start_run(experiment_id=experiment.id)
+
+    def end_exp(self):
+        self.active_recorder.end_run()
+        self.active_recorder = None
+    
+    def __create_exp(self, experiment_name=None, uri=None):
+        # init experiment
+        experiment = MLflowExperiment()
+        # set the tracking uri
+        if uri is None:
+            print('No tracking URI is provided. The default tracking URI is set as `mlruns` under the working directory.')
+        else:
+            self.current_uri = uri
+        mlflow.set_tracking_uri(self.current_uri)
+        # start the experiment
+        if experiment_name is None:
+            print('No experiment name provided. The default experiment name is set as `experiment`.')
+            experiment_id = mlflow.create_experiment('experiment')
+            # set the active experiment
+            mlflow.set_experiment('experiment')
+            experiment_name = 'experiment'
+        else:
+            if experiment_name not in self.experiments:
+                if mlflow.get_experiment_by_name(experiment_name) is not None:
+                    raise Exception('The experiment has already been created before. Please pick another name or delete the files under uri.')
+                experiment_id = mlflow.create_experiment(experiment_name)
+            else:
+                experiment_id = self.experiments[experiment_name].id
+                experiment = self.experiments[experiment_name]
+        # set the active experiment
+        mlflow.set_experiment(experiment_name)
+        # set up experiment
+        experiment.id = experiment_id    
+        experiment.name = experiment_name
+
+        return experiment
+    
+    def search_records(self, experiment_ids, **kwargs):
+        filter_string = '' if kwargs.get('filter_string') is None else kwargs.get('filter_string')
+        run_view_type = 1 if kwargs.get('run_view_type') is None else kwargs.get('run_view_type')
+        max_results = 100000 if kwargs.get('max_results') is None else kwargs.get('max_results')
+        order_by = kwargs.get('order_by')
+        return mlflow.search_runs(experiment_ids, filter_string, run_view_type, max_results, order_by)
+    
+    def get_exp(self, experiment_id=None, experiment_name=None):
+        assert experiment_id is not None or experiment_name is not None, 'Please provide at least one of the experiment id or name to retrieve an experiment.'
+        if experiment_name is not None:
+            return self.experiments[experiment_name]
+        elif:
+            for name in self.experiments:
+                if self.experiments[name].id == experiment_id:
+                    return self.experiments[name]
+        else:
+            print('No valid experiment is found. Please make sure the id and name are correctly given.')
+
+    def delete_exp(self, experiment_id):
+        mlflow.delete_experiment(experiment_id)
+        self.experiments = {key:val for key, val in self.experiments.items() if val.id != experiment_id}
+
+    def get_uri(self, type):
+        if uri == 'default':
+            return self.default_uri
+        elif uri == 'current':
+            return self.current_uri
+        else:
+            raise ValueError('Input type is not supported. Please choose type default or current to get the uri.')
+
+    def get_recorder(self):
+        return self.active_recorder
\ No newline at end of file
diff --git a/qlib/workflow/record.py b/qlib/workflow/record.py
index 7895cf0fb..071c92691 100644
--- a/qlib/workflow/record.py
+++ b/qlib/workflow/record.py
@@ -2,7 +2,7 @@
 # Licensed under the MIT License.
 
 import mlflow
-import shutil
+import shutil, os, pickle, tempfile, codecs
 from pathlib import Path
 from ..utils.objm import FileManager
 
@@ -12,45 +12,39 @@ class Recorder:
     (The link: https://mlflow.org/docs/latest/python_api/mlflow.html)
     """
 
-    def __init__(self, experiment_id, project_path=None):
+    def __init__(self, experiment_id):
         self.experiment_id = experiment_id
         self.recorder_id = None
         self.recorder_name = None
-        self.fm = None
-        self.artifact_uri = None
     
     def set_recorder_name(self, rname):
         self.recorder_name = rname
 
-    def save_object(self, name, data):
+    def save_object(self, data, name, local_path=None):
         """
-        Save object such as prediction file or model checkpoints.
+        Save object such as prediction file or model checkpoints to the artifact URI.
 
         Parameters
         ----------
-        name : str
-            name of the file to be saved.
         data : any type
             the data to be saved.
-
-        Returns
-        -------
-        None.
+        name : str
+            name of the file to be saved.
+        local_path : str
+            if provided, them save the file or directory to the artifact URI.
         """
         raise NotImplementedError(f"Please implement the `save_object` method.")
 
-    def save_objects(self, name_data_list):
+    def save_objects(self, data_name_list, local_path=None):
         """
-        Save objects such as prediction file or model checkpoints.
+        Save objects such as prediction file or model checkpoints to the artifact URI.
 
         Parameters
         ----------
-        name_data_list : list
-            list of (name, data) pairs
-
-        Returns
-        -------
-        None.
+        data_name_list : list
+            list of (data, name) pairs
+        local_path : str
+            if provided, them save the file or directory to the artifact URI.
         """
         raise NotImplementedError(f"Please implement the `save_objects` method.")
 
@@ -98,99 +92,36 @@ class Recorder:
         """
         raise NotImplementedError(f"Please implement the `end_run` method.")
 
-    def log_param(self, key, value):
-        """
-        Log a parameter under the current run.
-
-        Parameters
-        ----------
-        key : str
-            the name of the parameter
-        value : str
-            the value of the parameter
-
-        Returns
-        -------
-        None
-        """
-        raise NotImplementedError(f"Please implement the `log_param` method.")
-
-    def log_params(self, params):
+    def log_params(self, **kwargs):
         """
         Log a batch of params for the current run.
 
         Parameters
         ----------
-        params : dict
-            dictionary of param_name: String -> value: String.
-
-        Returns
-        -------
-        None
+        keyword arguments
+            key, value pair to be logged as parameters.
         """
         raise NotImplementedError(f"Please implement the `log_params` method.")
 
-    def log_metric(self, key, value, step=None):
-        """
-        Log a metric under the current run.
-
-        Parameters
-        ----------
-        key : str
-            the name of the metric
-        value : float
-            the value of the metric
-
-        Returns
-        -------
-        None
-        """
-        raise NotImplementedError(f"Please implement the `log_metric` method.")
-
-    def log_metrics(self, metrics, step=None):
+    def log_metrics(self, step=None, **kwargs):
         """
         Log multiple metrics for the current run.
 
         Parameters
         ----------
-        metrics : dict
-            dictionary of metric_name: String -> value: Float.
-
-        Returns
-        -------
-        None
+        keyword arguments
+            key, value pair to be logged as metrics.
         """
         raise NotImplementedError(f"Please implement the `log_metrics` method.")
-    
-    def set_tag(self, key, value):
-        """
-        Set a tag under the current run.
 
-        Parameters
-        ----------
-        key : str
-            the name of the tag
-        value : str
-            the value of the tag
-
-        Returns
-        -------
-        None
-        """
-        raise NotImplementedError(f"Please implement the `set_tag` method.")
-
-    def set_tags(self, tags):
+    def set_tags(self, **kwargs):
         """
         Log a batch of tags for the current run.
 
         Parameters
         ----------
-        tags : dict
-            dictionary of tag_name: String -> value: String.
-
-        Returns
-        -------
-        None
+        keyword arguments
+            key, value pair to be logged as tags.
         """
         raise NotImplementedError(f"Please implement the `log_tags` method.")
 
@@ -202,67 +133,22 @@ class Recorder:
         ----------
         key : str
             the name of the tag to be deleted.
-
-        Returns
-        -------
-        None
         """
         raise NotImplementedError(f"Please implement the `delete_tag` method.")
-    
-    def log_artifact(self, local_path, artifact_path=None):
-        """
-        Log a local file or directory as an artifact of the currently active run.
-
-        Parameters
-        ----------
-        local_path : str
-            path to the file to write.
-        artifact_path : str
-            the directory in `artifact_uri` to write to.
-
-        Returns
-        -------
-        None
-        """
-        raise NotImplementedError(f"Please implement the `log_artifact` method.")
-
-    def log_artifacts(self, local_dir, artifact_path=None):
-        """
-        Log all the contents of a local directory as artifacts of the run.
-
-        Parameters
-        ----------
-        local_dir : str
-            path to the directory of files to write.
-        artifact_path : str
-            the directory in `artifact_uri` to write to.
-
-        Returns
-        -------
-        None
-        """
-        raise NotImplementedError(f"Please implement the `log_artifacts` method.")
-
-    def get_artifact_uri(self, artifact_path=None):
-        """
-        Get the absolute URI of the specified artifact in the currently active run.
-
-        Parameters
-        ----------
-        artifact_path : str
-            the directory in `artifact_uri` to write to.
-
-        Returns
-        -------
-        An absolute URI referring to the specified artifact or currently active Recorder.
-        """
-        raise NotImplementedError(f"Please implement the `get_artifact_uri` method.")
 
 
 class MLflowRecorder(Recorder):
     '''
     Use mlflow to implement a Recorder.
+
+    Due to the fact that mlflow will only log artifact from a file or directory, we decide to 
+    use file manager to help maintain the objects in the project.
     '''
+    def __init__(self, experiment_id):
+        super(MLflowRecorder, self).__init__(experiment_id)
+        self.fm = None
+        self.temp_dir = None
+
     def start_run(self, run_id=None, experiment_id=None, 
                     run_name=None, nested=False):
         if run_id is None:
@@ -277,65 +163,67 @@ class MLflowRecorder(Recorder):
         self.recorder_id = run.info.run_id
         self.artifact_uri = run.info.artifact_uri
         # set up file manager for saving objects
-        if self.artifact_uri.startswith('file:/'):
-            self.fm = FileManager(Path(urllib.parse.urlparse(self.artifact_uri).path))
-        else:
-            self.fm = FileManager(Path(self.artifact_uri))
-        print(self.artifact_uri)
+        self.temp_dir = tempfile.mkdtemp()
+        self.fm = FileManager(Path(self.temp_dir).absolute())
         return run
     
     def end_run(self):
         mlflow.end_run()
+        shutil.rmtree(self.temp_dir)
 
-    def save_object(self, name, data):
-        self.fm.save_obj(data, name)
-        import urllib
-        print(urllib.parse.urlparse(self.artifact_uri).scheme)
-        try:
-            self.log_artifact(self.fm.path / name)
-        except shutil.SameFileError:
-            pass
-        except Exception as e:
-            print(e)
+    def save_object(self, data, name, local_path=None):
+        if local_path is None:
+            assert data is not None and name is not None, "Please provide data and name input."
+            self.fm.save_obj(data, name)
+            mlflow.log_artifact(self.fm.path / name)
+            self.fm.remove(name)
+        else:
+            mlflow.log_artifact(local_path)
 
-    def save_objects(self, name_data_list):
-        self.fm.save_objs(name_data_list)
-        try:
-            self.log_artifacts(self.fm.path)
-        except shutil.SameFileError:
-            pass
-        except Exception as e:
-            print(e)
+    def save_objects(self, data_name_list, local_path=None):
+        if local_path is None:
+            assert data_name_list is not None, "Please provide data_name_list input."
+            self.fm.save_objs(data_name_list)
+            mlflow.log_artifacts(self.fm.path)
+            for obj, name in data_name_list:
+                self.fm.remove(name)
+        else:
+            mlflow.log_artifacts(local_path)
 
     def load_object(self, name):
-        return self.fm.load_obj(name)
+        client = mlflow.tracking.MlflowClient()
+        path = client.download_artifacts(self.recorder_id, name)
+        try:
+            with Path(path).open('rb') as f:
+                f.seek(0)
+                return pickle.load(f)
+        except:
+            with codecs.open(path, mode="r", encoding='utf-8') as f:
+                    return f.read()
+        
+    def log_params(self, **kwargs):
+        keys = list(kwargs.keys())
+        if len(keys) == 0:
+            mlflow.log_param(keys[0], kwargs.get(keys[0]))
+        else:
+            mlflow.log_params(dict(kwargs))
 
-    def log_param(self, key, value):
-        mlflow.log_param(key, value)
-
-    def log_params(self, params):
-        mlflow.log_params(params)
-
-    def log_metric(self, key, value, step=None):
-        mlflow.log_metric(key, value, step)
-
-    def log_metrics(self, metrics, step=None):
-        mlflow.log_metrics(metrics, step)
+    def log_metrics(self, step=None, **kwargs):
+        keys = list(kwargs.keys())
+        if len(keys) == 0:
+            mlflow.log_metric(keys[0], kwargs.get(keys[0]))
+        else:
+            mlflow.log_metrics(dict(kwargs))
     
-    def set_tag(self, key, value):
-        mlflow.set_tag(key, value)
-
-    def set_tags(self, tags):
-        mlflow.set_tags(tags)
+    def set_tags(self, **kwargs):
+        keys = list(kwargs.keys())
+        if len(keys) == 0:
+            mlflow.set_tag(keys[0], kwargs.get(keys[0]))
+        else:
+            mlflow.set_tags(dict(kwargs))
 
     def delete_tag(self, key):
         mlflow.delete_tag(key)
-    
-    def log_artifact(self, local_path, artifact_path=None):
-        mlflow.log_artifact(local_path, artifact_path)
-
-    def log_artifacts(self, local_dir, artifact_path=None):
-        mlflow.log_artifacts(local_dir, artifact_path)
 
     def get_artifact_uri(self, artifact_path=None):
         if self.artifact_uri is not None: