diff --git a/CMakeLists.txt b/CMakeLists.txt
index 6bc6a8077c1e9b242af50f1b912e91bbc6c3a9fb..fb1c85bf742c80308edb009c080cb0da6d409ee0 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -28,7 +28,9 @@ if(NOT CMAKE_CROSSCOMPILING)
 endif(NOT CMAKE_CROSSCOMPILING)
 find_package(Git REQUIRED)
 find_package(Threads REQUIRED)
-find_package(Boost QUIET)
+if(NOT ANDROID)
+    find_package(Boost QUIET)
+endif()
 
 include(simd)
 
@@ -151,7 +153,9 @@ if(WITH_GOLANG)
 endif(WITH_GOLANG)
 
 add_subdirectory(paddle)
-add_subdirectory(python)
+if(WITH_PYTHON)
+  add_subdirectory(python)
+endif()
 if(WITH_DOC)
     add_subdirectory(doc)
 endif()
diff --git a/cmake/cross_compiling/android.cmake b/cmake/cross_compiling/android.cmake
index 9724c16122ab2e6be55864c8716698c9b9d7c3f0..dcfbc5d0129d7763daaf17c33d2b7791e87d3018 100644
--- a/cmake/cross_compiling/android.cmake
+++ b/cmake/cross_compiling/android.cmake
@@ -106,6 +106,9 @@ IF("${CMAKE_VERSION}" VERSION_LESS "3.7.0")
                 SET(CMAKE_SYSTEM_PROCESSOR armv7-a)
             ENDIF()
         ENDIF()
+        IF(ANDROID_ABI STREQUAL "arm64-v8a")
+            SET(ANDROID_TOOLCHAIN_NAME aarch64-linux-android)
+        ENDIF()
         SET(ANDROID_TOOLCHAIN_PREFIX "${ANDROID_TOOLCHAIN_ROOT}/bin/${ANDROID_TOOLCHAIN_NAME}-")
     ENDIF()
 
@@ -162,6 +165,10 @@ IF("${CMAKE_VERSION}" VERSION_LESS "3.7.0")
         ENDIF()
     ENDIF()
 
+    IF(ANDROID_ABI STREQUAL "arm64-v8a")
+      LIST(APPEND ANDROID_COMPILER_FLAGS -march=armv8-a)
+    ENDIF()
+
     STRING(REPLACE ";" " " ANDROID_COMPILER_FLAGS "${ANDROID_COMPILER_FLAGS}")
     STRING(REPLACE ";" " " ANDROID_LINKER_FLAGS "${ANDROID_LINKER_FLAGS}")
 
diff --git a/cmake/external/glog.cmake b/cmake/external/glog.cmake
index bd401faa6eb8a583bce542db68852f8571681daf..8a594a825abdca6a0f989b94fa42f97d6df5e10a 100644
--- a/cmake/external/glog.cmake
+++ b/cmake/external/glog.cmake
@@ -52,6 +52,7 @@ ExternalProject_Add(
 
 ADD_LIBRARY(glog STATIC IMPORTED GLOBAL)
 SET_PROPERTY(TARGET glog PROPERTY IMPORTED_LOCATION ${GLOG_LIBRARIES})
-ADD_DEPENDENCIES(glog extern_glog)
+ADD_DEPENDENCIES(glog extern_glog gflags)
+LINK_LIBRARIES(glog gflags)
 
 LIST(APPEND external_project_dependencies glog)
diff --git a/cmake/external/openblas.cmake b/cmake/external/openblas.cmake
index 5b9d9844ed21ceb507a8e01676c3533f4e3dd8fb..60a1041936437775e0994157b8ffcb7c52b7ab87 100644
--- a/cmake/external/openblas.cmake
+++ b/cmake/external/openblas.cmake
@@ -32,7 +32,12 @@ IF(NOT ${CBLAS_FOUND})
             # arm_soft_fp_abi branch of OpenBLAS to support softfp
             #   https://github.com/xianyi/OpenBLAS/tree/arm_soft_fp_abi
             SET(OPENBLAS_COMMIT "b5c96fcfcdc82945502a2303116a64d89985daf5")
-            SET(OPTIONAL_ARGS HOSTCC=${HOST_C_COMPILER} TARGET=ARMV7 ARM_SOFTFP_ABI=1 USE_THREAD=0)
+            IF(ANDROID_ABI MATCHES "^armeabi(-v7a)?$")
+                SET(TARGET "ARMV7")
+            ELSEIF(ANDROID_ABI STREQUAL "arm64-v8a")
+                SET(TARGET "ARMV8")
+            ENDIF()
+            SET(OPTIONAL_ARGS HOSTCC=${HOST_C_COMPILER} TARGET=${TARGET} ARM_SOFTFP_ABI=1 USE_THREAD=0)
         ELSEIF(RPI)
             # use hardfp
             SET(OPENBLAS_COMMIT "v0.2.19")
diff --git a/cmake/generic.cmake b/cmake/generic.cmake
index 71ee266611df27cd72c586c49ce2765e6ea0471b..716955c7b42f3d05b3ec8387cf81dd9cb1c409bf 100644
--- a/cmake/generic.cmake
+++ b/cmake/generic.cmake
@@ -90,11 +90,11 @@
 # including binary directory for generated headers.
 include_directories(${CMAKE_CURRENT_BINARY_DIR})
 
-if(NOT APPLE)
+if(NOT APPLE AND NOT ANDROID)
     find_package(Threads REQUIRED)
     link_libraries(${CMAKE_THREAD_LIBS_INIT})
     set(CMAKE_CXX_LINK_EXECUTABLE "${CMAKE_CXX_LINK_EXECUTABLE} -ldl -lrt")
-endif(NOT APPLE)
+endif(NOT APPLE AND NOT ANDROID)
 
 function(merge_static_libs TARGET_NAME)
   set(libs ${ARGN})
diff --git a/go/cmd/pserver/pserver.go b/go/cmd/pserver/pserver.go
index 48351ab6d016b3594a4d983ba0980b2b0eb11c89..b331b8126cadc2c5df516fb241913415b2e3e73d 100644
--- a/go/cmd/pserver/pserver.go
+++ b/go/cmd/pserver/pserver.go
@@ -34,7 +34,7 @@ func main() {
 
 	var idx int
 
-	var cp *pserver.Checkpoint
+	var cp pserver.Checkpoint
 	var e *pserver.EtcdClient
 	if *index >= 0 {
 		idx = *index
diff --git a/go/pserver/service.go b/go/pserver/service.go
index 65db6970a703606cb74dc9f7677757f16f1e7181..fec2ec61dc67756439d9fa478788d1f155876538 100644
--- a/go/pserver/service.go
+++ b/go/pserver/service.go
@@ -83,7 +83,7 @@ type parameterCheckpoint struct {
 }
 
 // NewCheckpointFromFile loads parameters and state from checkpoint file
-func NewCheckpointFromFile(cpPath string, idx int, e *EtcdClient) (*Checkpoint, error) {
+func NewCheckpointFromFile(cpPath string, idx int, e *EtcdClient) (Checkpoint, error) {
 	v, err := e.GetKey(PsPath+string(idx), 3*time.Second)
 	if err != nil {
 		return nil, err
@@ -110,7 +110,7 @@ func NewCheckpointFromFile(cpPath string, idx int, e *EtcdClient) (*Checkpoint,
 	}
 
 	dec := gob.NewDecoder(bytes.NewReader(content))
-	cp := &Checkpoint{}
+	cp := Checkpoint{}
 	if err = dec.Decode(cp); err != nil {
 		return nil, err
 	}
@@ -119,7 +119,7 @@ func NewCheckpointFromFile(cpPath string, idx int, e *EtcdClient) (*Checkpoint,
 
 // NewService creates a new service, will bypass etcd registration if no
 // endpoints specified. It will recovery from checkpoint file if a exists a specified checkpoint.
-func NewService(idx int, interval time.Duration, path string, client *EtcdClient, cp *Checkpoint) (*Service, error) {
+func NewService(idx int, interval time.Duration, path string, client *EtcdClient, cp Checkpoint) (*Service, error) {
 	s := &Service{
 		idx:                idx,
 		checkpointInterval: interval,
@@ -130,7 +130,7 @@ func NewService(idx int, interval time.Duration, path string, client *EtcdClient
 	s.initialized = make(chan struct{})
 
 	if cp != nil {
-		for _, item := range *cp {
+		for _, item := range cp {
 			p := ParameterWithConfig{
 				Param:  item.Param,
 				Config: item.Config,
diff --git a/paddle/CMakeLists.txt b/paddle/CMakeLists.txt
index 0b5e9a2599dbec6d40eb70609d61ebea2b7e1486..4b06966fba2bc9f92756be0cb8110bbcd5272423 100644
--- a/paddle/CMakeLists.txt
+++ b/paddle/CMakeLists.txt
@@ -14,6 +14,7 @@ if(Boost_FOUND)
   add_subdirectory(memory)
   add_subdirectory(platform)
   add_subdirectory(framework)
+  add_subdirectory(operators)
   add_subdirectory(pybind)
 endif()
 
diff --git a/paddle/framework/CMakeLists.txt b/paddle/framework/CMakeLists.txt
index 7aea6086f5c95ed019aa302f0dfbde707c3e90d9..2a93779878312aa8a84a721641b39e87db9c5ef3 100644
--- a/paddle/framework/CMakeLists.txt
+++ b/paddle/framework/CMakeLists.txt
@@ -11,8 +11,8 @@ proto_library(op_proto SRCS op_proto.proto DEPS attr_type)
 cc_test(op_proto_test SRCS op_proto_test.cc DEPS op_proto protobuf)
 proto_library(op_desc SRCS op_desc.proto DEPS attr_type)
 cc_test(op_desc_test SRCS op_desc_test.cc DEPS op_desc protobuf)
-cc_library(operator SRCS operator.cc DEPS op_desc protobuf)
-cc_test(operator_test SRCS operator_test.cc DEPS operator op_registry place)
+cc_library(operator SRCS operator.cc DEPS op_desc device_context)
+cc_test(operator_test SRCS operator_test.cc DEPS operator op_registry)
 cc_library(op_registry SRCS op_registry.cc DEPS op_proto op_desc)
 cc_test(op_registry_test SRCS op_registry_test.cc DEPS op_registry operator)
 py_proto_compile(framework_py_proto SRCS attr_type.proto op_proto.proto op_desc.proto)
diff --git a/paddle/framework/op_registry.h b/paddle/framework/op_registry.h
index 248c7a1a3b866ae3bf2af33d0ff67b92d0f9c456..61dfcb704964cd730a8fc9ab6ad394cd47cb4666 100644
--- a/paddle/framework/op_registry.h
+++ b/paddle/framework/op_registry.h
@@ -1,6 +1,7 @@
 #pragma once
 
 #include <algorithm>
+#include <type_traits>
 #include "paddle/framework/attr_checker.h"
 #include "paddle/framework/op_desc.pb.h"
 #include "paddle/framework/op_proto.pb.h"
@@ -81,8 +82,6 @@ class OpProtoAndCheckerMaker {
     return op_checker_->AddAttrChecker<T>(name);
   }
 
-  void AddType(const std::string& op_type) { proto_->set_type(op_type); }
-
   void AddComment(const std::string& comment) {
     *(proto_->mutable_comment()) = comment;
   }
@@ -101,8 +100,11 @@ class OpRegistry {
     OpProto& op_proto = protos()[op_type];
     OpAttrChecker& op_checker = op_checkers()[op_type];
     ProtoMakerType(&op_proto, &op_checker);
-    PADDLE_ENFORCE(op_proto.IsInitialized(),
-                   "Fail to initialize %s's OpProto !", op_type);
+    *op_proto.mutable_type() = op_type;
+    PADDLE_ENFORCE(
+        op_proto.IsInitialized(),
+        "Fail to initialize %s's OpProto, because %s is not initialized",
+        op_type, op_proto.InitializationErrorString());
   }
 
   static OperatorBase* CreateOp(const OpDesc& op_desc) {
@@ -119,6 +121,7 @@ class OpRegistry {
       op->attrs_[attr.name()] = AttrTypeHelper::GetAttrValue(attr);
     }
     op_checkers().at(op_type).Check(op->attrs_);
+    op->Init();
     return op;
   }
 
@@ -142,18 +145,73 @@ class OpRegistry {
 template <typename OpType, typename ProtoMakerType>
 class OpRegisterHelper {
  public:
-  OpRegisterHelper(std::string op_type) {
+  OpRegisterHelper(const char* op_type) {
     OpRegistry::RegisterOp<OpType, ProtoMakerType>(op_type);
   }
 };
 
-#define REGISTER_OP(type, op_class, op_maker_class)                         \
-  class op_class##Register {                                                \
-   private:                                                                 \
-    const static OpRegisterHelper<op_class, op_maker_class> reg;            \
-  };                                                                        \
-  const OpRegisterHelper<op_class, op_maker_class> op_class##Register::reg( \
-      #type)
+#define STATIC_ASSERT_GLOBAL_NAMESPACE(uniq_name, msg)                        \
+  struct __test_global_namespace_##uniq_name##__ {};                          \
+  static_assert(std::is_same<::__test_global_namespace_##uniq_name##__,       \
+                             __test_global_namespace_##uniq_name##__>::value, \
+                msg)
+
+#define REGISTER_OP(__op_type, __op_class, __op_maker_class)                 \
+  STATIC_ASSERT_GLOBAL_NAMESPACE(__reg_op__##__op_type,                      \
+                                 "REGISTER_OP must be in global namespace"); \
+  static ::paddle::framework::OpRegisterHelper<__op_class, __op_maker_class> \
+      __op_register_##__op_type##__(#__op_type);                             \
+  int __op_register_##__op_type##_handle__() { return 0; }
+
+#define REGISTER_OP_KERNEL(type, GPU_OR_CPU, PlaceType, KernelType)       \
+  STATIC_ASSERT_GLOBAL_NAMESPACE(                                         \
+      __reg_op_kernel_##type##_##GPU_OR_CPU##__,                          \
+      "REGISTER_OP_KERNEL must be in global namespace");                  \
+  struct __op_kernel_register__##type##__ {                               \
+    __op_kernel_register__##type##__() {                                  \
+      ::paddle::framework::OperatorWithKernel::OpKernelKey key;           \
+      key.place_ = PlaceType();                                           \
+      ::paddle::framework::OperatorWithKernel::AllOpKernels()[#type][key] \
+          .reset(new KernelType());                                       \
+    }                                                                     \
+  };                                                                      \
+  static __op_kernel_register__##type##__ __reg_kernel_##type##__;        \
+  int __op_kernel_register_##type##_handle_##GPU_OR_CPU##__() { return 0; }
+
+#define REGISTER_OP_GPU_KERNEL(type, KernelType) \
+  REGISTER_OP_KERNEL(type, GPU, ::paddle::platform::GPUPlace, KernelType)
+
+#define REGISTER_OP_CPU_KERNEL(type, KernelType) \
+  REGISTER_OP_KERNEL(type, CPU, ::paddle::platform::CPUPlace, KernelType)
+
+#define USE_OP_WITHOUT_KERNEL(op_type)                      \
+  STATIC_ASSERT_GLOBAL_NAMESPACE(                           \
+      __use_op_without_kernel_##op_type,                    \
+      "USE_OP_WITHOUT_KERNEL must be in global namespace"); \
+  extern int __op_register_##op_type##_handle__();          \
+  static int __use_op_ptr_##op_type##_without_kernel__      \
+      __attribute__((unused)) = __op_register_##op_type##_handle__()
+
+#define USE_OP_KERNEL(op_type, DEVICE_TYPE)                               \
+  STATIC_ASSERT_GLOBAL_NAMESPACE(                                         \
+      __use_op_kernel_##op_type##_##DEVICE_TYPE##__,                      \
+      "USE_OP_KERNEL must be in global namespace");                       \
+  extern int __op_kernel_register_##op_type##_handle_##DEVICE_TYPE##__(); \
+  static int __use_op_ptr_##op_type##_##DEVICE_TYPE##_kernel__            \
+      __attribute__((unused)) =                                           \
+          __op_kernel_register_##op_type##_handle_##DEVICE_TYPE##__()
+
+#ifdef PADDLE_ONLY_CPU
+#define USE_OP(op_type)           \
+  USE_OP_WITHOUT_KERNEL(op_type); \
+  USE_OP_KERNEL(op_type, CPU);
+
+#else
+#define USE_OP(op_type)           \
+  USE_OP_WITHOUT_KERNEL(op_type); \
+  USE_OP_KERNEL(op_type, CPU);    \
+  USE_OP_KERNEL(op_type, GPU)
+#endif
 
 }  // namespace framework
 }  // namespace paddle
diff --git a/paddle/framework/op_registry_test.cc b/paddle/framework/op_registry_test.cc
index f5162fb870a91e566a0d2b1419050fe0799b199b..9bcc0407addca555e0b47b8178f6304396ce81fc 100644
--- a/paddle/framework/op_registry_test.cc
+++ b/paddle/framework/op_registry_test.cc
@@ -1,8 +1,6 @@
 #include "paddle/framework/op_registry.h"
 #include <gtest/gtest.h>
 
-using namespace paddle::framework;
-
 namespace paddle {
 namespace framework {
 class CosineOp : public OperatorBase {
@@ -21,13 +19,10 @@ class CosineOpProtoAndCheckerMaker : public OpProtoAndCheckerMaker {
     AddAttr<float>("scale", "scale of cosine op")
         .SetDefault(1.0)
         .LargerThan(0.0);
-    AddType("cos");
     AddComment("This is cos op");
   }
 };
 
-REGISTER_OP(cos_sim, CosineOp, CosineOpProtoAndCheckerMaker);
-
 class MyTestOp : public OperatorBase {
  public:
   void InferShape(const std::shared_ptr<Scope>& scope) const override {}
@@ -48,15 +43,17 @@ class MyTestOpProtoAndCheckerMaker : public OpProtoAndCheckerMaker {
     };
     AddAttr<int>("test_attr", "a simple test attribute")
         .AddCustomChecker(my_checker);
-    AddType("my_test_op");
     AddComment("This is my_test op");
   }
 };
-
-REGISTER_OP(my_test_op, MyTestOp, MyTestOpProtoAndCheckerMaker);
 }  // namespace framework
 }  // namespace paddle
 
+REGISTER_OP(cos_sim, paddle::framework::CosineOp,
+            paddle::framework::CosineOpProtoAndCheckerMaker);
+REGISTER_OP(my_test_op, paddle::framework::MyTestOp,
+            paddle::framework::MyTestOpProtoAndCheckerMaker);
+
 TEST(OpRegistry, CreateOp) {
   paddle::framework::OpDesc op_desc;
   op_desc.set_type("cos_sim");
@@ -71,7 +68,7 @@ TEST(OpRegistry, CreateOp) {
 
   paddle::framework::OperatorBase* op =
       paddle::framework::OpRegistry::CreateOp(op_desc);
-  auto scope = std::make_shared<Scope>();
+  auto scope = std::make_shared<paddle::framework::Scope>();
   paddle::platform::CPUDeviceContext dev_ctx;
   op->Run(scope, dev_ctx);
   float scale_get = op->GetAttr<float>("scale");
@@ -114,7 +111,7 @@ TEST(OpRegistry, DefaultValue) {
 
   paddle::framework::OperatorBase* op =
       paddle::framework::OpRegistry::CreateOp(op_desc);
-  auto scope = std::make_shared<Scope>();
+  auto scope = std::make_shared<paddle::framework::Scope>();
   paddle::platform::CPUDeviceContext dev_ctx;
   op->Run(scope, dev_ctx);
   ASSERT_EQ(op->GetAttr<float>("scale"), 1.0);
@@ -169,13 +166,8 @@ TEST(OpRegistry, CustomChecker) {
   paddle::framework::OperatorBase* op =
       paddle::framework::OpRegistry::CreateOp(op_desc);
   paddle::platform::CPUDeviceContext dev_ctx;
-  auto scope = std::make_shared<Scope>();
+  auto scope = std::make_shared<paddle::framework::Scope>();
   op->Run(scope, dev_ctx);
   int test_attr = op->GetAttr<int>("test_attr");
   ASSERT_EQ(test_attr, 4);
 }
-
-int main(int argc, char** argv) {
-  testing::InitGoogleTest(&argc, argv);
-  return RUN_ALL_TESTS();
-}
\ No newline at end of file
diff --git a/paddle/framework/operator.h b/paddle/framework/operator.h
index 0ce422e007c39ce0c3f5f7a89650cc211919ea8f..d3c55e0ceb6737772be38b536a107900ee895b12 100644
--- a/paddle/framework/operator.h
+++ b/paddle/framework/operator.h
@@ -17,6 +17,7 @@ limitations under the License. */
 #include <paddle/framework/attr_checker.h>
 #include <paddle/framework/op_desc.pb.h>
 #include <paddle/framework/scope.h>
+#include <paddle/framework/tensor.h>
 #include <paddle/platform/device_context.h>
 #include <paddle/platform/place.h>
 #include <paddle/utils/Error.h>
@@ -49,6 +50,10 @@ class OperatorBase {
 
   std::string DebugString() const;
 
+  /// Init will be called after CreateOperator, you can put some initialization
+  /// logic here.
+  virtual void Init() {}
+
   /// InferShape infer the size of Variables used by this Operator with
   /// information inside scope
   virtual void InferShape(const std::shared_ptr<Scope>& scope) const = 0;
@@ -99,6 +104,19 @@ class OpKernel {
   virtual ~OpKernel() {}
 };
 
+template <typename T>
+struct VarToTensor {};
+
+template <>
+struct VarToTensor<Tensor*> {
+  Tensor* operator()(Variable* var) { return var->GetMutable<Tensor>(); }
+};
+
+template <>
+struct VarToTensor<const Tensor*> {
+  const Tensor* operator()(Variable* var) { return &var->Get<Tensor>(); }
+};
+
 class OperatorWithKernel : public OperatorBase {
  public:
   struct OpKernelKey {
@@ -132,19 +150,36 @@ class OperatorWithKernel : public OperatorBase {
   AllOpKernels() {
     static std::unordered_map<std::string, OpKernelMap> g_all_op_kernels;
     return g_all_op_kernels;
+  }
+  void InferShape(const std::shared_ptr<Scope>& scope) const final {
+    std::vector<const Tensor*> ins;
+    VarNamesToTensors(scope, inputs_, &ins);
+    std::vector<Tensor*> outs;
+    VarNamesToTensors(scope, outputs_, &outs);
+    InferShape(ins, outs);
   };
+
+ private:
+  template <typename T>
+  void VarNamesToTensors(const std::shared_ptr<Scope>& scope,
+                         const std::vector<std::string>& var_names,
+                         std::vector<T>* container) const {
+    container->reserve(var_names.size());
+    VarToTensor<T> convert;
+    for (auto& name : var_names) {
+      auto var = scope->GetVariable(name);
+      if (var != nullptr) {
+        container->push_back(convert(var));
+      } else {
+        container->push_back(nullptr);
+      }
+    }
+  }
+
+ protected:
+  virtual void InferShape(const std::vector<const Tensor*>& inputs,
+                          const std::vector<Tensor*>& outputs) const = 0;
 };
 
 }  // namespace framework
 }  // namespace paddle
-
-#define REGISTER_OP_KERNEL(type, PlaceType, KernelType)                   \
-  struct __op_kernel_register__##type##__ {                               \
-    __op_kernel_register__##type##__() {                                  \
-      ::paddle::framework::OperatorWithKernel::OpKernelKey key;           \
-      key.place_ = PlaceType();                                           \
-      ::paddle::framework::OperatorWithKernel::AllOpKernels()[#type][key] \
-          .reset(new KernelType());                                       \
-    }                                                                     \
-  };                                                                      \
-  static __op_kernel_register__##type##__ __reg_kernel_##type##__
diff --git a/paddle/framework/operator_test.cc b/paddle/framework/operator_test.cc
index be8c4be2d429648b3c8a708c7f8bdcae3ff2d283..204b601a4aad52ee57b81235851c9806b607799f 100644
--- a/paddle/framework/operator_test.cc
+++ b/paddle/framework/operator_test.cc
@@ -21,54 +21,21 @@ namespace framework {
 
 class OperatorTest : public OperatorBase {
  public:
+  void Init() override { x = 1; }
   void InferShape(const std::shared_ptr<Scope>& scope) const override {}
   void Run(const std::shared_ptr<Scope>& scope,
            const platform::DeviceContext& dev_ctx) const override {
     float scale = GetAttr<float>("scale");
     ASSERT_NEAR(scale, 3.14, 1e-5);
     ASSERT_EQ(scope->GetVariable(inputs_[0]), nullptr);
+    ASSERT_EQ(x, 1);
     ASSERT_NE(scope->GetVariable(outputs_[0]), nullptr);
   }
-};
 
-class OperatorTestProtoAndCheckerMaker : public OpProtoAndCheckerMaker {
  public:
-  OperatorTestProtoAndCheckerMaker(OpProto* proto, OpAttrChecker* op_checker)
-      : OpProtoAndCheckerMaker(proto, op_checker) {
-    AddInput("input", "input of test op");
-    AddOutput("output", "output of test op");
-    AddAttr<float>("scale", "scale of cosine op")
-        .SetDefault(1.0)
-        .LargerThan(0.0);
-    AddType("test_operator");
-    AddComment("This is test op");
-  }
+  float x = 0;
 };
 
-REGISTER_OP(test_operator, OperatorTest, OperatorTestProtoAndCheckerMaker);
-
-TEST(OperatorBase, all) {
-  OpDesc op_desc;
-  op_desc.set_type("test_operator");
-  *op_desc.mutable_inputs()->Add() = "IN1";
-  *op_desc.mutable_outputs()->Add() = "OUT1";
-  auto attr = op_desc.mutable_attrs()->Add();
-  attr->set_name("scale");
-  attr->set_type(paddle::framework::AttrType::FLOAT);
-  float scale = 3.14;
-  attr->set_f(scale);
-
-  platform::CPUDeviceContext device_context;
-  auto scope = std::make_shared<Scope>();
-
-  OperatorBase* op = paddle::framework::OpRegistry::CreateOp(op_desc);
-  ASSERT_EQ(op->GetAttr<float>("scale"), scale);
-  scope->CreateVariable("OUT1");
-  op->Run(scope, device_context);
-  std::cout << op->DebugString() << std::endl;
-  delete op;
-}
-
 class OpKernelTestProtoAndCheckerMaker : public OpProtoAndCheckerMaker {
  public:
   OpKernelTestProtoAndCheckerMaker(OpProto* proto, OpAttrChecker* op_checker)
@@ -78,14 +45,14 @@ class OpKernelTestProtoAndCheckerMaker : public OpProtoAndCheckerMaker {
     AddAttr<float>("scale", "scale of cosine op")
         .SetDefault(1.0)
         .LargerThan(0.0);
-    AddType("test_operator");
     AddComment("This is test op");
   }
 };
 
 class OpWithKernelTest : public OperatorWithKernel {
- public:
-  void InferShape(const std::shared_ptr<Scope>& scope) const override {}
+ protected:
+  void InferShape(const std::vector<const Tensor*>& inputs,
+                  const std::vector<Tensor*>& outputs) const override {}
 };
 
 class CPUKernelTest : public OpKernel {
@@ -98,10 +65,16 @@ class CPUKernelTest : public OpKernel {
   }
 };
 
-REGISTER_OP(op_with_kernel, OpWithKernelTest, OpKernelTestProtoAndCheckerMaker);
-REGISTER_OP_KERNEL(op_with_kernel, platform::CPUPlace, CPUKernelTest);
+}  // namespace framework
+}  // namespace paddle
+
+REGISTER_OP(op_with_kernel, paddle::framework::OpWithKernelTest,
+            paddle::framework::OpKernelTestProtoAndCheckerMaker);
+REGISTER_OP_CPU_KERNEL(op_with_kernel, paddle::framework::CPUKernelTest);
 
 TEST(OpKernel, all) {
+  using namespace paddle::framework;
+
   OpDesc op_desc;
   op_desc.set_type("op_with_kernel");
   *op_desc.mutable_inputs()->Add() = "IN1";
@@ -111,7 +84,7 @@ TEST(OpKernel, all) {
   attr->set_type(paddle::framework::AttrType::FLOAT);
   attr->set_f(3.14);
 
-  platform::CPUDeviceContext cpu_device_context;
+  paddle::platform::CPUDeviceContext cpu_device_context;
   auto scope = std::make_shared<Scope>();
 
   OperatorBase* op = paddle::framework::OpRegistry::CreateOp(op_desc);
@@ -119,5 +92,3 @@ TEST(OpKernel, all) {
 
   delete op;
 }
-}  // namespace framework
-}  // namespace paddle
\ No newline at end of file
diff --git a/paddle/operators/CMakeLists.txt b/paddle/operators/CMakeLists.txt
new file mode 100644
index 0000000000000000000000000000000000000000..40bb326512c118178184120d4bc26dc127689ff3
--- /dev/null
+++ b/paddle/operators/CMakeLists.txt
@@ -0,0 +1,6 @@
+if(WITH_GPU)
+    nv_library(add_op SRCS add_op.cc add_op.cu DEPS operator op_registry glog ddim)
+else()
+    cc_library(add_op SRCS add_op.cc DEPS operator op_registry glog ddim)
+endif()
+cc_test(add_op_test SRCS add_op_test.cc DEPS add_op)
diff --git a/paddle/operators/add_op.cc b/paddle/operators/add_op.cc
new file mode 100644
index 0000000000000000000000000000000000000000..2766f0bf258ed863a4297c1e4a2be4673cbf3044
--- /dev/null
+++ b/paddle/operators/add_op.cc
@@ -0,0 +1,44 @@
+#include <paddle/framework/op_registry.h>
+#include <paddle/framework/tensor.h>
+#include <paddle/operators/add_op.h>
+
+namespace paddle {
+namespace operators {
+
+class AddOp : public framework::OperatorWithKernel {
+protected:
+  void InferShape(
+      const std::vector<const framework::Tensor *> &inputs,
+      const std::vector<framework::Tensor *> &outputs) const override {
+    PADDLE_ENFORCE(inputs.size() == 2, "Input size of AddOp must be two");
+    PADDLE_ENFORCE(outputs.size() == 1, "Output size of AddOp must be one");
+    PADDLE_ENFORCE(
+        inputs[0] != nullptr && inputs[1] != nullptr && outputs[0] != nullptr,
+        "Inputs/Outputs of AddOp must all be set");
+    PADDLE_ENFORCE(inputs[0]->dims() == inputs[1]->dims(),
+                   "Two input of Add Op's dimension must be same.");
+    // Need set dims in Tensor
+    // outputs[0]->set_dims(inputs[0]->dims())
+  }
+};
+
+class AddOpMaker : public framework::OpProtoAndCheckerMaker {
+public:
+  AddOpMaker(framework::OpProto *proto, framework::OpAttrChecker *op_checker)
+      : framework::OpProtoAndCheckerMaker(proto, op_checker) {
+    AddInput("X", "The first input of add op");
+    AddInput("Y", "The second input of add op");
+    AddOutput("Out", "The output of add op");
+    AddComment(R"DOC(
+Two Element Add Operator.
+
+The equation is: Out = X + Y
+)DOC");
+  }
+};
+}  // namespace op
+}  // namespace paddle
+
+REGISTER_OP(add_two, paddle::operators::AddOp, paddle::operators::AddOpMaker);
+REGISTER_OP_CPU_KERNEL(
+    add_two, ::paddle::operators::AddKernel<::paddle::platform::CPUPlace>);
\ No newline at end of file
diff --git a/paddle/operators/add_op.cu b/paddle/operators/add_op.cu
new file mode 100644
index 0000000000000000000000000000000000000000..5979345fffd68d71ba09dc96874d8ff9471bdbcc
--- /dev/null
+++ b/paddle/operators/add_op.cu
@@ -0,0 +1,5 @@
+#include <paddle/operators/add_op.h>
+#include <paddle/framework/op_registry.h>
+
+REGISTER_OP_GPU_KERNEL(add_two,
+                       paddle::operators::AddKernel<paddle::platform::GPUPlace>);
\ No newline at end of file
diff --git a/paddle/operators/add_op.h b/paddle/operators/add_op.h
new file mode 100644
index 0000000000000000000000000000000000000000..17d459dbc86af73fa86934a5ccce9da509c59c6b
--- /dev/null
+++ b/paddle/operators/add_op.h
@@ -0,0 +1,17 @@
+#pragma once
+#include <glog/logging.h>
+#include <paddle/framework/operator.h>
+
+namespace paddle {
+namespace operators {
+
+template <typename Place>
+class AddKernel : public framework::OpKernel {
+public:
+  void Compute(const KernelContext &context) const override {
+    LOG(INFO) << "Add kernel in " << typeid(Place).name();
+  }
+};
+
+}  // namespace op
+}  // namespace paddle
diff --git a/paddle/operators/add_op_test.cc b/paddle/operators/add_op_test.cc
new file mode 100644
index 0000000000000000000000000000000000000000..f554ac1bef3255f136ad4407a7a1096bdc2b1db5
--- /dev/null
+++ b/paddle/operators/add_op_test.cc
@@ -0,0 +1,9 @@
+#include <gtest/gtest.h>
+#define private public
+#include <paddle/framework/op_registry.h>
+USE_OP(add_two);
+TEST(AddOp, GetOpProto) {
+  auto& protos = paddle::framework::OpRegistry::protos();
+  auto it = protos.find("add_two");
+  ASSERT_NE(it, protos.end());
+}
\ No newline at end of file
diff --git a/paddle/platform/dynload/cublas.h b/paddle/platform/dynload/cublas.h
index 47c7a8ec21fc6e84d5f45f68b7dc8a766003be75..c44b7240a885c2ef71e550df645dbaded69f9944 100644
--- a/paddle/platform/dynload/cublas.h
+++ b/paddle/platform/dynload/cublas.h
@@ -67,20 +67,20 @@ extern void *cublas_dso_handle;
   __macro(cublasSgemm);                   \
   __macro(cublasDgemm);                   \
   __macro(cublasSgeam);                   \
-  __macro(cublasDgeam);
-
-DECLARE_DYNAMIC_LOAD_CUBLAS_V2_WRAP(cublasCreate);
-DECLARE_DYNAMIC_LOAD_CUBLAS_V2_WRAP(cublasDestroy);
-DECLARE_DYNAMIC_LOAD_CUBLAS_V2_WRAP(cublasSetStream);
-DECLARE_DYNAMIC_LOAD_CUBLAS_V2_WRAP(cublasSetPointerMode);
-DECLARE_DYNAMIC_LOAD_CUBLAS_V2_WRAP(cublasGetPointerMode);
-DECLARE_DYNAMIC_LOAD_CUBLAS_WRAP(cublasSgemmBatched);
-DECLARE_DYNAMIC_LOAD_CUBLAS_WRAP(cublasDgemmBatched);
-DECLARE_DYNAMIC_LOAD_CUBLAS_WRAP(cublasCgemmBatched);
-DECLARE_DYNAMIC_LOAD_CUBLAS_WRAP(cublasZgemmBatched);
-DECLARE_DYNAMIC_LOAD_CUBLAS_WRAP(cublasSgetrfBatched);
-DECLARE_DYNAMIC_LOAD_CUBLAS_WRAP(cublasSgetriBatched);
-DECLARE_DYNAMIC_LOAD_CUBLAS_WRAP(cublasDgetrfBatched);
+  __macro(cublasDgeam);                   \
+  __macro(cublasCreate_v2);               \
+  __macro(cublasDestroy_v2);              \
+  __macro(cublasSetStream_v2);            \
+  __macro(cublasSetPointerMode_v2);       \
+  __macro(cublasGetPointerMode_v2);       \
+  __macro(cublasSgemmBatched);            \
+  __macro(cublasDgemmBatched);            \
+  __macro(cublasCgemmBatched);            \
+  __macro(cublasZgemmBatched);            \
+  __macro(cublasSgetrfBatched);           \
+  __macro(cublasSgetriBatched);           \
+  __macro(cublasDgetrfBatched);           \
+  __macro(cublasDgetriBatched)
 
 CUBLAS_BLAS_ROUTINE_EACH(DECLARE_DYNAMIC_LOAD_CUBLAS_WRAP);
 
diff --git a/python/paddle/v2/framework/default_scope_funcs.py b/python/paddle/v2/framework/default_scope_funcs.py
new file mode 100644
index 0000000000000000000000000000000000000000..4e772326c94b7ee44906c71f13e9420e078a1917
--- /dev/null
+++ b/python/paddle/v2/framework/default_scope_funcs.py
@@ -0,0 +1,83 @@
+"""
+Default scope function.
+
+`Paddle` manages Scope as programming language's scope.  It just a 
+thread-local stack of Scope. Top of that stack is current scope, the bottom 
+of that stack is all scopes' parent. 
+
+Invoking `create_var/get_var`  can `create/get` variable in current scope. 
+Invoking `enter_local_scope/leave_local_scope` can create or destroy local 
+scope. 
+
+A `scoped_function` will take a `function` as input. That function will be 
+invoked in a new local scope. 
+"""
+
+import paddle.v2.framework.core
+import threading
+
+__tl_scope__ = threading.local()
+
+__all__ = [
+    'get_cur_scope', 'enter_local_scope', 'leave_local_scope', 'create_var',
+    'get_var', 'scoped_function'
+]
+
+
+def get_cur_scope():
+    """
+    Get current scope.
+    :rtype: paddle.v2.framework.core.Scope
+    """
+    cur_scope_stack = getattr(__tl_scope__, 'cur_scope', None)
+    if cur_scope_stack is None:
+        __tl_scope__.cur_scope = list()
+    if len(__tl_scope__.cur_scope) == 0:
+        __tl_scope__.cur_scope.append(paddle.v2.framework.core.Scope(None))
+    return __tl_scope__.cur_scope[-1]
+
+
+def enter_local_scope():
+    """
+    Enter a new local scope
+    """
+    cur_scope = get_cur_scope()
+    new_scope = paddle.v2.framework.core.Scope(cur_scope)
+    __tl_scope__.cur_scope.append(new_scope)
+
+
+def leave_local_scope():
+    """
+    Leave local scope
+    """
+    __tl_scope__.cur_scope.pop()
+
+
+def create_var(name):
+    """
+    create variable in current scope.
+    """
+    return get_cur_scope().create_var(name)
+
+
+def get_var(name):
+    """
+    get variable in current scope.
+    """
+    return get_cur_scope().get_var(name)
+
+
+def scoped_function(func):
+    """
+    invoke `func` in new scope.
+    
+    :param func: a callable function that will be run in new scope.
+    :type func: callable
+    """
+    enter_local_scope()
+    try:
+        func()
+    except:
+        raise
+    finally:
+        leave_local_scope()
diff --git a/python/paddle/v2/framework/tests/CMakeLists.txt b/python/paddle/v2/framework/tests/CMakeLists.txt
index d809917af14aaf0ffc3a3d95fd5d8fbe028a61cb..7023e82b5f08eb49fa1fee27118a7907d58312e2 100644
--- a/python/paddle/v2/framework/tests/CMakeLists.txt
+++ b/python/paddle/v2/framework/tests/CMakeLists.txt
@@ -1 +1,2 @@
-add_python_test(test_framework test_protobuf.py test_scope.py)
+add_python_test(test_framework test_protobuf.py test_scope.py
+    test_default_scope_funcs.py)
diff --git a/python/paddle/v2/framework/tests/test_default_scope_funcs.py b/python/paddle/v2/framework/tests/test_default_scope_funcs.py
new file mode 100644
index 0000000000000000000000000000000000000000..81033deb1546c81e2566ec5474f45dc56781644a
--- /dev/null
+++ b/python/paddle/v2/framework/tests/test_default_scope_funcs.py
@@ -0,0 +1,33 @@
+from paddle.v2.framework.default_scope_funcs import *
+import unittest
+
+
+class TestDefaultScopeFuncs(unittest.TestCase):
+    def test_cur_scope(self):
+        self.assertIsNotNone(get_cur_scope())
+
+    def test_none_variable(self):
+        self.assertIsNone(get_var("test"))
+
+    def test_create_var_get_var(self):
+        var_a = create_var("var_a")
+        self.assertIsNotNone(var_a)
+        self.assertIsNotNone(get_cur_scope().get_var('var_a'))
+        enter_local_scope()
+        self.assertIsNotNone(get_cur_scope().get_var('var_a'))
+        leave_local_scope()
+
+    def test_var_get_int(self):
+        def __new_scope__():
+            i = create_var("var_i")
+            self.assertFalse(i.is_int())
+            i.set_int(10)
+            self.assertTrue(i.is_int())
+            self.assertEqual(10, i.get_int())
+
+        for _ in xrange(10):
+            scoped_function(__new_scope__)
+
+
+if __name__ == '__main__':
+    unittest.main()