diff --git a/docs/about/standard.rst b/docs/about/standard.rst
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@@ -0,0 +1,52 @@
+.. _code_standard:
+
+=============
+Code Standard
+=============
+
+Docstring
+============
+Please use the `Numpydoc Style <https://stackoverflow.com/a/24385103>`_.
+
+You can fix the bug by inputting the following code in the command line.
+
+
+Continuous Integration
+======================
+Continuous Integration (CI) tools help you stick to the quality standards by running tests every time you push a new commit and reporting the results to a pull request.
+
+``Learnware Market`` will check the following tests when you pull a request:
+1. We will check your code style pylint, you can fix your code style by the following commands:
+
+.. code-block:: bash
+
+    pip install black
+    python -m black . -l 120
+
+
+2. We will check the pytest, you commit should can pass all tests in the tests directory. Run the following commands to check:
+
+.. code-block:: bash
+
+    pip install pytest
+    python -m pytest tests
+
+Development Guidance
+=================================
+
+As a developer, you often want make changes to ``Learnware Market`` and hope it would reflect directly in your environment without reinstalling it. You can install ``Learnware Market`` in editable mode with following command.
+
+- For Windows and Linux users:
+
+    .. code-block:: bash
+        
+        $ git clone https://git.nju.edu.cn/learnware/learnware-market.git && cd learnware-market
+        $ python setup.py install
+
+- For macOS users:
+
+    .. code-block:: bash
+        
+        $ conda install -c pytorch faiss
+        $ git clone https://git.nju.edu.cn/learnware/learnware-market.git && cd learnware-market
+        $ python setup.py install
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diff --git a/docs/index.rst b/docs/index.rst
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--- a/docs/index.rst
+++ b/docs/index.rst
@@ -68,6 +68,7 @@ Document Structure
    :maxdepth: 3
    :caption: ABOUTS:
 
+   For Developer <about/standard.rst>
    Contributors <about/about.rst>
    Changelog <about/changelog.rst>
    About us <http://www.lamda.nju.edu.cn/>