diff --git a/python/paddle/v2/framework/network.py b/python/paddle/v2/framework/network.py
deleted file mode 100644
index cfeb0e3dec0fd2c6ad4d2d2501f97932495fdd41..0000000000000000000000000000000000000000
--- a/python/paddle/v2/framework/network.py
+++ /dev/null
@@ -1,131 +0,0 @@
-import paddle.v2.framework.core as core
-from paddle.v2.framework.create_op_creation_methods import op_creations
-from default_scope_funcs import new_var, find_var, get_cur_scope
-
-__all__ = ['Network']  # Only expose Network
-
-
-class NetworkFunctor(object):
-    """
-    Network Op Creation Function. Used internally in this module.
-    It convert string input to Variable. If it is not created before, just 
-    create in scope.
-    
-    It is a functor object. means the instances are callable.
-    
-    :param func: The op creation function which generated in Python.
-    :param net: The Network instance.
-    """
-
-    def __init__(self, func, net):
-        self.func = func
-        self.net = net
-
-    def __call__(self, *args, **kwargs):
-        if len(args) != 0:
-            raise ValueError("Paddle must use keyword argument")
-        inputs = self.func.all_input_args
-        for ipt in inputs:
-            if ipt in kwargs:
-                var = kwargs[ipt]
-                if isinstance(var, basestring):
-                    tmp = new_var(var)
-                    self.net.var_names[tmp] = var
-                    var = tmp
-
-                if not isinstance(var, core.Variable):
-                    raise TypeError(
-                        "Input of op creation must be string or variable")
-
-                kwargs[ipt] = self.net.var_names[var]
-
-        notemp_outputs = self.func.all_not_temp_output_args
-
-        for name in notemp_outputs:
-            if name not in kwargs:
-                kwargs[
-                    name] = self.func.__name__ + "@OUT@%d" % core.unique_integer(
-                    )
-
-        outputs = self.func.all_output_args
-        for opt in outputs:
-            if opt in kwargs:
-                var = kwargs[opt]
-                if isinstance(var, basestring):
-                    tmp = new_var(var)
-                    self.net.var_names[tmp] = var
-                    var = tmp
-
-                if not isinstance(var, core.Variable):
-                    raise TypeError(
-                        "Output of op creation must be string or variable")
-                kwargs[opt] = self.net.var_names[var]
-
-        op = self.func(**kwargs)
-
-        self.net.net.add_op(op)
-
-        lst = [find_var(kwargs[opt]) for opt in notemp_outputs]
-        if len(lst) == 1:
-            return lst[0]
-        elif len(lst) == 0:
-            return None
-        else:
-            return lst
-
-
-class Network(object):
-    """
-    The network concept. It avoid user to manually create operator, create 
-    variable, and combine them into a Net. Just use Network.xxx can create the
-    operator, create variables in default scope, and add them into `self.net`.
-    
-    For example:
-    
-    ..  code-block: python
-    
-        net = Network()
-        out = net.add_two(X="a", Y="b")
-        fc_out = net.fc(X="out", W="fc.w")
-        
-        net.run(...)
-    """
-
-    def __init__(self):
-        self.net = core.Net.create()
-        funcs = (func_name for func_name in dir(op_creations)
-                 if not func_name.startswith("__"))
-        self.var_names = dict()
-
-        # TODO(yuyang18): This code can work, but do not generate a good
-        # docstring, try to give a better way generate function in runtime
-        # later.
-        for func_name in funcs:
-            func = getattr(op_creations, func_name)
-            impl = NetworkFunctor(func, self)
-            setattr(self, func_name, impl.__call__)
-        self.__complete_add_op__ = False
-
-    def infer_shape(self):
-        self.complete_add_op()
-        self.net.infer_shape(get_cur_scope())
-
-    def run(self, device_context):
-        self.complete_add_op()
-        self.net.run(get_cur_scope(), device_context)
-
-    def __str__(self):
-        return str(self.net)
-
-    def complete_add_op(self):
-        if not self.__complete_add_op__:
-            self.net.complete_add_op()
-            self.__complete_add_op__ = True
-
-
-if __name__ == '__main__':
-    net = Network()
-    out = net.add_two(X="a", Y="b")
-    fc_out = net.fc(X=out, W="fc.w", b="fc.b", activation="softmax")
-    net.complete_add_op()
-    print net
diff --git a/python/paddle/v2/framework/op.py b/python/paddle/v2/framework/op.py
index 1fbaaf60c76cbed158de9436127fbe8c12c7d2a6..bfeff643e7f2b8a0493318bf7e0e95c1d891126c 100644
--- a/python/paddle/v2/framework/op.py
+++ b/python/paddle/v2/framework/op.py
@@ -187,6 +187,9 @@ class OperatorFactory(object):
 
         return self.get_op_creation_info(t)['method'](**kwargs)
 
+    def types(self):
+        return self.op_methods.keys()
+
     def get_op_creation_info(self, t):
         if t not in self.op_methods:
             raise ValueError("operator %s is not registered", t)
diff --git a/python/paddle/v2/framework/tests/CMakeLists.txt b/python/paddle/v2/framework/tests/CMakeLists.txt
index e66197030e2dd9e113e4564aaacb1c5dab25771b..41c2c83c327960fe1640aa4e5f5756ad098c802c 100644
--- a/python/paddle/v2/framework/tests/CMakeLists.txt
+++ b/python/paddle/v2/framework/tests/CMakeLists.txt
@@ -1,8 +1,8 @@
 add_python_test(test_framework
     test_protobuf.py
     test_scope.py
+    test_operator.py
     test_default_scope_funcs.py
-    test_op_creation_methods.py
     test_net.py
     test_tensor.py
     test_fc_op.py
@@ -13,5 +13,5 @@ add_python_test(test_framework
     test_sigmoid_op.py
     test_softmax_op.py
     test_rowwise_add_op.py
-    test_network.py
-    gradient_checker.py)
+    gradient_checker.py
+    )
diff --git a/python/paddle/v2/framework/tests/gradient_checker.py b/python/paddle/v2/framework/tests/gradient_checker.py
index 4022de1c40e41aa77a7f31d82b55b63585cbd5f5..cfd29932f5b46920815819c5a75d62a0138e21a2 100644
--- a/python/paddle/v2/framework/tests/gradient_checker.py
+++ b/python/paddle/v2/framework/tests/gradient_checker.py
@@ -1,5 +1,5 @@
 import paddle.v2.framework.core as core
-from paddle.v2.framework.create_op_creation_methods import op_creations
+from paddle.v2.framework.op import Operator
 import numpy
 import unittest
 
@@ -80,7 +80,7 @@ if __name__ == '__main__':
 
     class GetNumericGradientTest(unittest.TestCase):
         def test_add_op(self):
-            add_op = op_creations.add_two(X="X", Y="Y", Out="Z")
+            add_op = Operator('add_two', X="X", Y="Y", Out="Z")
             x = numpy.random.random((10, 1)).astype("float32")
             y = numpy.random.random((10, 1)).astype("float32")
 
diff --git a/python/paddle/v2/framework/tests/op_test_util.py b/python/paddle/v2/framework/tests/op_test_util.py
index 98fae1b975ad6243b20e5c19ec6ff68d5536cd74..3a8d253fe01c1832f5da92fdc043c69758fa144c 100644
--- a/python/paddle/v2/framework/tests/op_test_util.py
+++ b/python/paddle/v2/framework/tests/op_test_util.py
@@ -1,7 +1,7 @@
 import paddle.v2.framework.core as core
 import unittest
 import numpy
-import paddle.v2.framework.create_op_creation_methods as creation
+from paddle.v2.framework.op import Operator
 
 
 class OpTestMeta(type):
@@ -21,18 +21,14 @@ class OpTestMeta(type):
         obj = super(OpTestMeta, cls).__new__(cls, name, bases, attrs)
 
         def test_all(self):
-            func = getattr(creation.op_creations, self.type, None)
-            self.assertIsNotNone(func)
-
             scope = core.Scope()
             kwargs = dict()
-            places = []
-            places.append(core.CPUPlace())
+            places = [core.CPUPlace()]
             if core.is_compile_gpu():
                 places.append(core.GPUPlace(0))
 
             for place in places:
-                for in_name in func.all_input_args:
+                for in_name in Operator.get_op_input_names(self.type):
                     if hasattr(self, in_name):
                         kwargs[in_name] = in_name
                         var = scope.new_var(in_name).get_tensor()
@@ -42,23 +38,23 @@ class OpTestMeta(type):
                     else:
                         kwargs[in_name] = "@EMPTY@"
 
-                for out_name in func.all_output_args:
+                for out_name in Operator.get_op_output_names(self.type):
                     if hasattr(self, out_name):
                         kwargs[out_name] = out_name
                         scope.new_var(out_name).get_tensor()
 
-                for attr_name in func.all_attr_args:
+                for attr_name in Operator.get_op_attr_names(self.type):
                     if hasattr(self, attr_name):
                         kwargs[attr_name] = getattr(self, attr_name)
 
-                op = func(**kwargs)
+                op = Operator(self.type, **kwargs)
 
                 op.infer_shape(scope)
 
                 ctx = core.DeviceContext.create(place)
                 op.run(scope, ctx)
 
-                for out_name in func.all_output_args:
+                for out_name in Operator.get_op_output_names(self.type):
                     actual = numpy.array(scope.find_var(out_name).get_tensor())
                     expect = getattr(self, out_name)
                     # TODO(qijun) The default decimal is 7, but numpy.dot and eigen.mul
diff --git a/python/paddle/v2/framework/tests/test_add_two_op.py b/python/paddle/v2/framework/tests/test_add_two_op.py
index 6e6643201bf361fce1bad7de10b2562f0525e00a..de89d1613f1bd1fabc7ac39aa757f6a207ae8161 100644
--- a/python/paddle/v2/framework/tests/test_add_two_op.py
+++ b/python/paddle/v2/framework/tests/test_add_two_op.py
@@ -2,7 +2,7 @@ import unittest
 
 import numpy
 import paddle.v2.framework.core as core
-import paddle.v2.framework.create_op_creation_methods as creation
+from paddle.v2.framework.op import Operator
 
 from op_test_util import OpTestMeta
 
@@ -19,7 +19,7 @@ class TestAddOp(unittest.TestCase):
 
 class TestAddGradOp(unittest.TestCase):
     def test_add_grad(self):
-        op = creation.op_creations.add_two(X="X", Y="Y", Out="Out")
+        op = Operator('add_two', X="X", Y="Y", Out="Out")
         backward_op = core.Operator.backward(op, set())
         self.assertEqual(backward_op.type(), "add_two_grad")
         expected = '''Op(add_two_grad), inputs:(X, Y, Out, Out@GRAD), outputs:(X@GRAD, Y@GRAD).'''
diff --git a/python/paddle/v2/framework/tests/test_fc_op.py b/python/paddle/v2/framework/tests/test_fc_op.py
index 00dc4399aaf59e6382692c3a4356f89a7e79a0c5..e24435839d305bb1a4ab7daa3e9684a421468fd8 100644
--- a/python/paddle/v2/framework/tests/test_fc_op.py
+++ b/python/paddle/v2/framework/tests/test_fc_op.py
@@ -1,7 +1,7 @@
 import paddle.v2.framework.core as core
 import unittest
 import numpy
-import paddle.v2.framework.create_op_creation_methods as creation
+from paddle.v2.framework.op import Operator
 
 
 class TestFc(unittest.TestCase):
@@ -24,7 +24,7 @@ class TestFc(unittest.TestCase):
         # Set a real numpy array here.
         # x_tensor.set(numpy.array([]))
 
-        op = creation.op_creations.fc(X="X", Y="Y", W="W")
+        op = Operator("fc", X="X", Y="Y", W="W")
 
         for out in op.outputs():
             if scope.find_var(out) is None:
diff --git a/python/paddle/v2/framework/tests/test_net.py b/python/paddle/v2/framework/tests/test_net.py
index db776d6b643dc4014da9f5dded8219180af639e3..b30896553dea4a4929038d524b23c6090bbed380 100644
--- a/python/paddle/v2/framework/tests/test_net.py
+++ b/python/paddle/v2/framework/tests/test_net.py
@@ -1,16 +1,16 @@
 import paddle.v2.framework.core as core
-from paddle.v2.framework.create_op_creation_methods import op_creations
+from paddle.v2.framework.op import Operator
 import unittest
 
 
 class TestNet(unittest.TestCase):
     def test_net_all(self):
         net = core.Net.create()
-        op1 = op_creations.add_two(X="X", Y="Y", Out="Out")
+        op1 = Operator("add_two", X="X", Y="Y", Out="Out")
         net.add_op(op1)
 
         net2 = core.Net.create()
-        net2.add_op(op_creations.fc(X="X", W="w", Y="fc.out"))
+        net2.add_op(Operator("fc", X="X", W="w", Y="fc.out"))
         net2.complete_add_op(True)
         net.add_op(net2)
         net.complete_add_op(True)
diff --git a/python/paddle/v2/framework/tests/test_network.py b/python/paddle/v2/framework/tests/test_network.py
deleted file mode 100644
index 6d53e233e959bd39b558ac97cdca381135505f8d..0000000000000000000000000000000000000000
--- a/python/paddle/v2/framework/tests/test_network.py
+++ /dev/null
@@ -1,32 +0,0 @@
-from paddle.v2.framework.network import Network
-import paddle.v2.framework.core as core
-import unittest
-
-
-class TestNet(unittest.TestCase):
-    def test_net_all(self):
-        net = Network()
-        out = net.add_two(X="X", Y="Y")
-        fc_out = net.fc(X=out, W="w")
-        net.complete_add_op()
-        self.assertTrue(isinstance(fc_out, core.Variable))
-        self.assertEqual(
-            '''Op(plain_net), inputs:(@EMPTY@, X, Y, w), outputs:(@TEMP@fc@0, add_two@OUT@0, fc@OUT@1).
-    Op(add_two), inputs:(X, Y), outputs:(add_two@OUT@0).
-    Op(fc), inputs:(add_two@OUT@0, w, @EMPTY@), outputs:(fc@OUT@1, @TEMP@fc@0).
-        Op(mul), inputs:(add_two@OUT@0, w), outputs:(@TEMP@fc@0).
-        Op(sigmoid), inputs:(@TEMP@fc@0), outputs:(fc@OUT@1).
-''', str(net))
-
-        net2 = Network()
-        tmp = net2.add_two(X="X", Y="Y")
-        self.assertTrue(isinstance(tmp, core.Variable))
-        net2.complete_add_op()
-        self.assertEqual(
-            '''Op(plain_net), inputs:(X, Y), outputs:(add_two@OUT@2).
-    Op(add_two), inputs:(X, Y), outputs:(add_two@OUT@2).
-''', str(net2))
-
-
-if __name__ == '__main__':
-    unittest.main()
diff --git a/python/paddle/v2/framework/tests/test_softmax_op.py b/python/paddle/v2/framework/tests/test_softmax_op.py
index c80888128781d98e4ed30d845a30b39121f66459..47abccd4b5c2fc3673c9fbd51084fa0c5e461b88 100644
--- a/python/paddle/v2/framework/tests/test_softmax_op.py
+++ b/python/paddle/v2/framework/tests/test_softmax_op.py
@@ -2,7 +2,7 @@ import unittest
 
 import numpy as np
 import paddle.v2.framework.core as core
-import paddle.v2.framework.create_op_creation_methods as creation
+from paddle.v2.framework.op import Operator
 
 from op_test_util import OpTestMeta
 
@@ -25,7 +25,7 @@ class TestSoftmaxOp(unittest.TestCase):
 
 class TestSoftmaxGradOp(unittest.TestCase):
     def test_softmax_grad(self):
-        op = creation.op_creations.softmax(X="X", Y="Y")
+        op = Operator('softmax', X="X", Y="Y")
         backward_op = core.Operator.backward(op, set())
         self.assertEqual(backward_op.type(), "softmax_grad")
         expected = '''Op(softmax_grad), inputs:(X, Y, Y@GRAD), outputs:(X@GRAD).'''