diff --git a/develop/doc/_sources/howto/read_source.md.txt b/develop/doc/_sources/howto/read_source.md.txt
index 383acb0c8251043c3c6bbf309d2e07bf0074cd4f..e4211abb3be9cace80bc14dbe3db3e0a31221dd0 100644
--- a/develop/doc/_sources/howto/read_source.md.txt
+++ b/develop/doc/_sources/howto/read_source.md.txt
@@ -6,10 +6,10 @@ Core: https://github.com/PaddlePaddle/Paddle/tree/develop/paddle/framework
 
 Operator: https://github.com/PaddlePaddle/Paddle/tree/develop/paddle/operators
 
-Optimizer: https://github.com/PaddlePaddle/Paddle/tree/develop/paddle/optimizer
-
 Memory: https://github.com/PaddlePaddle/Paddle/tree/develop/paddle/memory
 
+Platform: https://github.com/PaddlePaddle/Paddle/tree/develop/paddle/platform
+
 # Compile Time
 
 The following **defines** the NN. The definition goes into this [protocol buffer](https://github.com/PaddlePaddle/Paddle/blob/develop/paddle/framework/framework.proto).
diff --git a/develop/doc/howto/read_source.html b/develop/doc/howto/read_source.html
index 363dc24766c39163f97d3e253565686d52c09f10..4acc88a052a6af8f98268f6138b9691326e946c2 100644
--- a/develop/doc/howto/read_source.html
+++ b/develop/doc/howto/read_source.html
@@ -209,8 +209,8 @@
 <p>Examples: https://github.com/PaddlePaddle/Paddle/tree/develop/python/paddle/v2/fluid/tests/book</p>
 <p>Core: https://github.com/PaddlePaddle/Paddle/tree/develop/paddle/framework</p>
 <p>Operator: https://github.com/PaddlePaddle/Paddle/tree/develop/paddle/operators</p>
-<p>Optimizer: https://github.com/PaddlePaddle/Paddle/tree/develop/paddle/optimizer</p>
 <p>Memory: https://github.com/PaddlePaddle/Paddle/tree/develop/paddle/memory</p>
+<p>Platform: https://github.com/PaddlePaddle/Paddle/tree/develop/paddle/platform</p>
 </div>
 <div class="section" id="compile-time">
 <span id="compile-time"></span><h1>Compile Time<a class="headerlink" href="#compile-time" title="Permalink to this headline">¶</a></h1>
diff --git a/develop/doc_cn/_sources/howto/read_source.md.txt b/develop/doc_cn/_sources/howto/read_source.md.txt
index 383acb0c8251043c3c6bbf309d2e07bf0074cd4f..e4211abb3be9cace80bc14dbe3db3e0a31221dd0 100644
--- a/develop/doc_cn/_sources/howto/read_source.md.txt
+++ b/develop/doc_cn/_sources/howto/read_source.md.txt
@@ -6,10 +6,10 @@ Core: https://github.com/PaddlePaddle/Paddle/tree/develop/paddle/framework
 
 Operator: https://github.com/PaddlePaddle/Paddle/tree/develop/paddle/operators
 
-Optimizer: https://github.com/PaddlePaddle/Paddle/tree/develop/paddle/optimizer
-
 Memory: https://github.com/PaddlePaddle/Paddle/tree/develop/paddle/memory
 
+Platform: https://github.com/PaddlePaddle/Paddle/tree/develop/paddle/platform
+
 # Compile Time
 
 The following **defines** the NN. The definition goes into this [protocol buffer](https://github.com/PaddlePaddle/Paddle/blob/develop/paddle/framework/framework.proto).
diff --git a/develop/doc_cn/howto/read_source.html b/develop/doc_cn/howto/read_source.html
index f587929ca44521076d77cd04e03a38720f34d4b5..791806e3c785ec67b96d6640569b1f2396d910cf 100644
--- a/develop/doc_cn/howto/read_source.html
+++ b/develop/doc_cn/howto/read_source.html
@@ -222,8 +222,8 @@
 <p>Examples: https://github.com/PaddlePaddle/Paddle/tree/develop/python/paddle/v2/fluid/tests/book</p>
 <p>Core: https://github.com/PaddlePaddle/Paddle/tree/develop/paddle/framework</p>
 <p>Operator: https://github.com/PaddlePaddle/Paddle/tree/develop/paddle/operators</p>
-<p>Optimizer: https://github.com/PaddlePaddle/Paddle/tree/develop/paddle/optimizer</p>
 <p>Memory: https://github.com/PaddlePaddle/Paddle/tree/develop/paddle/memory</p>
+<p>Platform: https://github.com/PaddlePaddle/Paddle/tree/develop/paddle/platform</p>
 </div>
 <div class="section" id="compile-time">
 <span id="compile-time"></span><h1>Compile Time<a class="headerlink" href="#compile-time" title="永久链接至标题">¶</a></h1>