diff --git a/README.md b/README.md
index cd0c8542f..9a4d2d868 100644
--- a/README.md
+++ b/README.md
@@ -45,13 +45,11 @@ For more details, please refer to our paper ["Qlib: An AI-oriented Quantitative
 
 At the module level, Qlib is a platform that consists of the above components. The components are designed as loose-coupled modules and each component could be used stand-alone.
 
-| Name                | Description                                                                                                                                                                                                                                                   |
-| ------              | -----                                                                                                                                                                                                                                                         |
-| `Data layer`        | `DataServer` focuses on providing high-performance infrastructure for users to manage and retrieve raw data. `DataEnhancement` will preprocess the data and provide the best dataset to be fed into the models.                                                    |
-| `Interday Model`    | `Interday model` focuses on producing prediction scores (aka. _alpha_). Models are trained by `Model Creator` and managed by `Model Manager`. Users could choose one or multiple models for prediction. Multiple models could be combined with `Ensemble` module. |
-| `Interday Strategy` | `Portfolio Generator` will take prediction scores as input and output the orders based on the current position to achieve the target portfolio.                                                                                                                      |
-| `Intraday Trading`  | `Order Executor` is responsible for executing orders output by `Interday Strategy` and returning the executed results.                                                                                                                                        |
-| `Analysis`          | Users could get a detailed analysis report of forecasting signals and portfolios in this part.                                                                                                                                                                     |
+| Name                   | Description                                                                                                                                                                                                                                                                                                                                                             |
+| ------                 | -----                                                                                                                                                                                                                                                                                                                                                                   |
+| `Infrastructure` layer | `Infrastructure` layer provides underlying support for Quant research. `DataServer` provides high-performance infrastructure for users to manage and retrieve raw data. `Trainer` provides flexible interface to control the training process of models which enable algorithms controlling the training process.                                                       |
+| `Workflow` layer       | `Workflow` layer covers the whole workflow of quantitative investment. `Information Extractor` extracts data for models. `Forecast Model` focuses on producing all kinds of forecast signals (e.g. _alpha_, risk) for other modules. With these signals `Portfolio Generator` will generate the target portfolio and produce orders to be executed by `Order Executor`. |
+| `Interface` layer      | `Interface` layer tries to present a user-friendly interface for the underlying system. `Analyser` module will provide users detailed analysis reports of forecasting signals, portfolios and execution results                                                                                                                                                                 |
 
 * The modules with hand-drawn style are under development and will be released in the future.
 * The modules with dashed borders are highly user-customizable and extendible.
diff --git a/docs/_static/img/framework.png b/docs/_static/img/framework.png
index 673f10e03..d8242f7c1 100644
Binary files a/docs/_static/img/framework.png and b/docs/_static/img/framework.png differ
diff --git a/qlib/model/trainer.py b/qlib/model/trainer.py
new file mode 100644
index 000000000..e4fc8eef9
--- /dev/null
+++ b/qlib/model/trainer.py
@@ -0,0 +1,40 @@
+# Copyright (c) Microsoft Corporation.
+# Licensed under the MIT License.
+from qlib.utils import init_instance_by_config, flatten_dict
+from qlib.workflow import R
+from qlib.workflow.record_temp import SignalRecord
+
+
+def task_train(config: dict, experiment_name):
+    """
+    task based training
+
+    Parameters
+    ----------
+    config : dict
+        A dict describing the training process
+    """
+
+    # model initiaiton
+    model = init_instance_by_config(config.get("task")["model"])
+    dataset = init_instance_by_config(config.get("task")["dataset"])
+
+    # start exp
+    with R.start(experiment_name=experiment_name):
+        # train model
+        R.log_params(**flatten_dict(config.get("task")))
+        model.fit(dataset)
+        recorder = R.get_recorder()
+
+        # generate records: prediction, backtest, and analysis
+        for record in config.get("task")["record"]:
+            if record["class"] == SignalRecord.__name__:
+                srconf = {"model": model, "dataset": dataset, "recorder": recorder}
+                record["kwargs"].update(srconf)
+                sr = init_instance_by_config(record)
+                sr.generate()
+            else:
+                rconf = {"recorder": recorder}
+                record["kwargs"].update(rconf)
+                ar = init_instance_by_config(record)
+                ar.generate()
diff --git a/qlib/workflow/cli.py b/qlib/workflow/cli.py
index 4c02f0592..b9c040e87 100644
--- a/qlib/workflow/cli.py
+++ b/qlib/workflow/cli.py
@@ -8,9 +8,7 @@ import qlib
 import fire
 import pandas as pd
 import ruamel.yaml as yaml
-from qlib.utils import init_instance_by_config, flatten_dict
-from qlib.workflow import R
-from qlib.workflow.record_temp import SignalRecord
+from ..model.trainer import task_train
 
 
 def get_path_list(path):
@@ -54,29 +52,7 @@ def workflow(config_path, experiment_name="workflow"):
     region = config.get("region")
     qlib.init(provider_uri=provider_uri, region=region)
 
-    # model initiaiton
-    model = init_instance_by_config(config.get("task")["model"])
-    dataset = init_instance_by_config(config.get("task")["dataset"])
-
-    # start exp
-    with R.start(experiment_name=experiment_name):
-        # train model
-        R.log_params(**flatten_dict(config.get("task")))
-        model.fit(dataset)
-        recorder = R.get_recorder()
-
-        # generate records: prediction, backtest, and analysis
-        for record in config.get("task")["record"]:
-            if record["class"] == SignalRecord.__name__:
-                srconf = {"model": model, "dataset": dataset, "recorder": recorder}
-                record["kwargs"].update(srconf)
-                sr = init_instance_by_config(record)
-                sr.generate()
-            else:
-                rconf = {"recorder": recorder}
-                record["kwargs"].update(rconf)
-                ar = init_instance_by_config(record)
-                ar.generate()
+    task_train(config, experiment_name=experiment_name)
 
 
 # function to run worklflow by config