diff --git a/python/paddle/v2/__init__.py b/python/paddle/v2/__init__.py
index c0a2bdc4259c3f48e8e7fdf4c8d8b2584253875a..cf01f37a3324ff0ea5dfb0ba588c6187a57f4666 100644
--- a/python/paddle/v2/__init__.py
+++ b/python/paddle/v2/__init__.py
@@ -18,11 +18,12 @@ import parameters
 import trainer
 import event
 import data_type
+import topology
 import py_paddle.swig_paddle as api
 
 __all__ = [
     'optimizer', 'layer', 'activation', 'parameters', 'init', 'trainer',
-    'event', 'data_type.py'
+    'event', 'data_type', 'topology'
 ]
 
 
diff --git a/python/paddle/v2/topology.py b/python/paddle/v2/topology.py
new file mode 100644
index 0000000000000000000000000000000000000000..ddba1b2345e5eb7d27b4943fd6ec834533ccf6a9
--- /dev/null
+++ b/python/paddle/v2/topology.py
@@ -0,0 +1,44 @@
+# Copyright (c) 2016 PaddlePaddle Authors. All Rights Reserved
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+from . import layer
+
+__all__ = ['Topology']
+
+
+class Topology(object):
+    """
+    Topology is used to store the information about all layers
+    and network configs.
+    """
+
+    def __init__(self, cost):
+        self.cost = cost
+        self.__model_config__ = layer.parse_network(cost)
+
+    def __call__(self):
+        return self.__model_config__
+
+    def get_layer(self, name):
+        """
+        get layer by layer name
+        :param name:
+        :return:
+        """
+        pass
+
+    def data_type(self):
+        """
+        """
+        pass