diff --git a/paddle/fluid/lite/core/CMakeLists.txt b/paddle/fluid/lite/core/CMakeLists.txt
index ddfbc83f6cbe71df7c64e226cfccd1fd73e416fa..c96727cfb8852ba8f024195051ca0be3e74b681c 100644
--- a/paddle/fluid/lite/core/CMakeLists.txt
+++ b/paddle/fluid/lite/core/CMakeLists.txt
@@ -7,3 +7,4 @@ cc_library(op_registry_lite SRCS op_registry.cc)
 cc_library(scope_lite SRCS scope.cc)
 
 cc_test(test_scope_lite SRCS scope_test.cc DEPS scope_lite)
+cc_test(test_kernel_lite SRCS kernel_test.cc DEPS target_wrapper_x86)
diff --git a/paddle/fluid/lite/core/kernel.h b/paddle/fluid/lite/core/kernel.h
index 6355cb659deb96e357bb60031e0fd9faf8dab740..e9eeb71a302aad90f29e5686fbb18acb64d8910d 100644
--- a/paddle/fluid/lite/core/kernel.h
+++ b/paddle/fluid/lite/core/kernel.h
@@ -14,46 +14,54 @@
 
 #pragma once
 
-#include <glog/logging.h>
-#include <boost/variant.hpp>
 #include <map>
 #include <string>
-#include "context.h"
 #include "paddle/fluid/framework/op_desc.h"
+#include "paddle/fluid/lite/core/context.h"
+#include "paddle/fluid/lite/core/target_wrapper.h"
+#include "paddle/fluid/lite/core/types.h"
 #include "paddle/fluid/lite/operators/op_params.h"
 #include "paddle/fluid/lite/utils/all.h"
-#include "target_wrapper.h"
 
 namespace paddle {
 namespace lite {
 
-// Light-weight kernel implementation.
-// The OpKernel is designed to implement the specific algorithm on a target
-// device.
-template <TargetType Target, PrecisionType Precision>
-class OpKernel {
+class KernelBase {
  public:
-  using context_t = Context<Target>;
-  using context_ptr_t = std::unique_ptr<context_t>;
-
-  OpKernel() = default;
+  virtual void Run() = 0;
 
-  void SetContext(context_ptr_t&& ctx) { context_ = std::move(ctx); }
+  template <TargetType Target>
+  void SetContext(std::unique_ptr<Context<Target>>&& ctx) {
+    context_.set<std::unique_ptr<Context<Target>>>(std::move(ctx));
+  }
 
-  void SetParam(operators::param_t param) { param_ = param; }
+  template <typename T>
+  void SetParam(T param) {
+    param_.set<T>(param);
+  }
 
   template <typename Param>
   Param& param() const {
     return param_.get<Param>();
   }
 
+ protected:
+  virtual ~KernelBase() = default;
+  core::any_context_t context_;
+  mutable operators::param_t param_;
+};
+
+// Light-weight kernel implementation.
+// The OpKernel is designed to implement the specific algorithm on a target
+// device.
+template <TargetType Target, PrecisionType Precision>
+class OpKernel : public KernelBase {
+ public:
   virtual void Run() { CHECK(false) << "Not Implemented"; }
 
-  virtual ~OpKernel() = default;
+  OpKernel() = default;
 
- protected:
-  context_ptr_t context_;
-  mutable operators::param_t param_;
+  virtual ~OpKernel() = default;
 };
 
 }  // namespace lite
diff --git a/paddle/fluid/lite/core/kernel_test.cc b/paddle/fluid/lite/core/kernel_test.cc
new file mode 100644
index 0000000000000000000000000000000000000000..42ebe2ed29d042ad3f7ba2d01fca501c6c1f9864
--- /dev/null
+++ b/paddle/fluid/lite/core/kernel_test.cc
@@ -0,0 +1,44 @@
+// Copyright (c) 2019 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.
+
+#include "paddle/fluid/lite/core/kernel.h"
+#include <gtest/gtest.h>
+#include "paddle/fluid/lite/core/op_lite.h"
+
+namespace paddle {
+namespace lite {
+namespace core {
+
+int test_code{-1};
+class SomeKernel : public OpKernel<TARGET(kHost), PRECISION(kFloat)> {
+ public:
+  void Run() override {
+    LOG(INFO) << "SomeKernel executed";
+    LOG(INFO) << param<operators::FcParam>().in_num_col_dims;
+    test_code = param<operators::FcParam>().in_num_col_dims;
+  }
+};
+
+TEST(Kernel, test) {
+  SomeKernel kernel;
+  operators::FcParam param;
+  param.in_num_col_dims = 100;
+  kernel.SetParam<operators::FcParam>(param);
+  kernel.Run();
+  ASSERT_EQ(test_code, 100);
+}
+
+}  // namespace core
+}  // namespace lite
+}  // namespace paddle
diff --git a/paddle/fluid/lite/core/op_lite.h b/paddle/fluid/lite/core/op_lite.h
index d660ff9c1f830460076b1b92fc95d32ae6cf2f1a..76f5851e43f4d25192a46fdb61b432f0a9f2e94f 100644
--- a/paddle/fluid/lite/core/op_lite.h
+++ b/paddle/fluid/lite/core/op_lite.h
@@ -57,7 +57,12 @@ class OpLite : public Registry {
     kRuntime,
   };
 
-  OpLite() {}
+  struct Place {
+    TargetType target{TARGET(kHost)};
+    PrecisionType precision{PRECISION(kFloat)};
+  };
+
+  OpLite() = default;
   OpLite(std::unique_ptr<OpContext> &&x) : op_context_(std::move(x)) {}
 
   // Check the shape.
@@ -71,12 +76,14 @@ class OpLite : public Registry {
   // Human-readable information.
   virtual std::string DebugString() const = 0;
 
+  const Place &kernel_place() const { return kernel_place_; }
+
  protected:
-  // Specify the kernel to run by default.
-  virtual void StaticPickKernel(
-      const std::vector<TargetType> &valid_targets) = 0;
+  // Specify the kernel to run by default. This will specify the value of
+  // `kernel_place_`.
+  virtual void StaticPickKernel(const std::vector<Place> &valid_targets) = 0;
 
-  void PickKernel(const std::vector<TargetType> &valid_places,
+  void PickKernel(const std::vector<Place> &valid_places,
                   KernelStrategy kernel_strategy = KernelStrategy::kStatic);
 
   // Create all the kernels for the valid targets.
@@ -86,6 +93,7 @@ class OpLite : public Registry {
 
  protected:
   std::unique_ptr<OpContext> op_context_;
+  Place kernel_place_;
 };
 
 }  // namespace lite
diff --git a/paddle/fluid/lite/core/op_registry.h b/paddle/fluid/lite/core/op_registry.h
index dfe54f5cbd275ff1ab728eeb3db8135c33cf96af..deb1654bc35a409020d92ab69df52b2d29927868 100644
--- a/paddle/fluid/lite/core/op_registry.h
+++ b/paddle/fluid/lite/core/op_registry.h
@@ -54,14 +54,14 @@ using KernelRegistryForTarget = Factory<OpKernel<Target, Precision>>;
 
 class KernelRegistry final {
  public:
-  using any_kernel_registor_t = variant<
-      KernelRegistryForTarget<TargetType::kCUDA, PrecisionType::kFloat> *,  //
-      KernelRegistryForTarget<TargetType::kCUDA, PrecisionType::kInt8> *,   //
-      KernelRegistryForTarget<TargetType::kX86, PrecisionType::kFloat> *,   //
-      KernelRegistryForTarget<TargetType::kX86, PrecisionType::kInt8> *,    //
-      KernelRegistryForTarget<TargetType::kARM, PrecisionType::kFloat> *,   //
-      KernelRegistryForTarget<TargetType::kHost, PrecisionType::kFloat> *   //
-      >;
+  using any_kernel_registor_t =
+      variant<KernelRegistryForTarget<TARGET(kCUDA), PRECISION(kFloat)> *,  //
+              KernelRegistryForTarget<TARGET(kCUDA), PRECISION(kInt8)> *,   //
+              KernelRegistryForTarget<TARGET(kX86), PRECISION(kFloat)> *,   //
+              KernelRegistryForTarget<TARGET(kX86), PRECISION(kInt8)> *,    //
+              KernelRegistryForTarget<TARGET(kARM), PRECISION(kFloat)> *,   //
+              KernelRegistryForTarget<TARGET(kHost), PRECISION(kFloat)> *   //
+              >;
 
   KernelRegistry() {
 /*
diff --git a/paddle/fluid/lite/core/types.h b/paddle/fluid/lite/core/types.h
new file mode 100644
index 0000000000000000000000000000000000000000..566d407f8508f59103dfc05850cd72bd6d73517f
--- /dev/null
+++ b/paddle/fluid/lite/core/types.h
@@ -0,0 +1,31 @@
+// Copyright (c) 2019 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.
+
+#pragma once
+
+#include "paddle/fluid/lite/core/context.h"
+#include "paddle/fluid/lite/utils/all.h"
+
+namespace paddle {
+namespace lite {
+namespace core {
+
+using any_context_t = variant<Context<TARGET(kX86)>,   //
+                              Context<TARGET(kCUDA)>,  //
+                              Context<TARGET(kARM)>    //
+                              >;
+
+}  // namespace core
+}  // namespace lite
+}  // namespace paddle
diff --git a/paddle/fluid/lite/operators/fc_op.h b/paddle/fluid/lite/operators/fc_op.h
index 720e6039c505f6557e1e55784bc769edbb72ce67..c2a7e9a8685d111f9d17aca9aa5630bb2ea89408 100644
--- a/paddle/fluid/lite/operators/fc_op.h
+++ b/paddle/fluid/lite/operators/fc_op.h
@@ -14,6 +14,7 @@
 
 #include <string>
 #include <vector>
+#include "paddle/fluid/lite/core/kernel.h"
 #include "paddle/fluid/lite/core/op_lite.h"
 #include "paddle/fluid/lite/core/scope.h"
 #include "paddle/fluid/lite/core/tensor.h"
@@ -53,8 +54,7 @@ class FcOpLite : public OpLite {
 
   std::string DebugString() const override { return "fc"; }
 
-  void StaticPickKernel(const std::vector<TargetType>& valid_targets) override {
-  }
+  void StaticPickKernel(const std::vector<Place>& valid_targets) override {}
 
  private:
   mutable FcParam param_;
diff --git a/paddle/fluid/lite/utils/factory.h b/paddle/fluid/lite/utils/factory.h
index 0d74d8b3a392f44230649deec9bc80fda2820cf6..680e9635c0276f1da856fc2a259cd0b4e341dd0e 100644
--- a/paddle/fluid/lite/utils/factory.h
+++ b/paddle/fluid/lite/utils/factory.h
@@ -19,6 +19,18 @@
 namespace paddle {
 namespace lite {
 
+/*
+ * Factor for any Type creator.
+ *
+ * Usage:
+ *
+ * struct SomeType;
+ * // Register a creator.
+ * Factory<SomeType>::Global().Register("some_key", [] ->
+ *                                      std::unique_ptr<SomeType> { ... });
+ * // Retrive a creator.
+ * auto some_type_instance = Factory<SomeType>::Global().Create("some_key");
+ */
 template <typename ItemType>
 class Factory {
  public:
@@ -55,6 +67,7 @@ class Registor {
  public:
   Registor(std::function<void()>&& functor) { functor(); }
 
+  // Touch will do nothing.
   int Touch() { return 0; }
 };
 
diff --git a/paddle/fluid/lite/x86/target_wrapper.cc b/paddle/fluid/lite/x86/target_wrapper.cc
index 533565787c24d3602cfaf59d800953611715678c..83250bcb498b8020eb3d0f417b93080c5aaee61e 100644
--- a/paddle/fluid/lite/x86/target_wrapper.cc
+++ b/paddle/fluid/lite/x86/target_wrapper.cc
@@ -12,22 +12,20 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#include "target_wrapper.h"
+#include "paddle/fluid/lite/core/target_wrapper.h"
 #include <algorithm>
 
 namespace paddle {
-namespace framework {
 namespace lite {
 
 template <>
-void TargetWrapper<X86>::MemcpySync(void* dst, void* src, size_t size,
-                                    IoDirection dir) {
-  std::copy_n(reinterpret_cast<uint8_t*>(src), size,
-              reinterpret_cast<uint8_t*>(dst));
+void TargetWrapper<TARGET(kX86)>::MemcpySync(void *dst, void *src, size_t size,
+                                             IoDirection dir) {
+  std::copy_n(reinterpret_cast<uint8_t *>(src), size,
+              reinterpret_cast<uint8_t *>(dst));
 }
 
-template class TargetWrapper<X86>;
+template class TargetWrapper<TARGET(kX86)>;
 
 }  // namespace lite
-}  // namespace framework
 }  // namespace paddle
diff --git a/paddle/fluid/lite/x86/target_wrapper.h b/paddle/fluid/lite/x86/target_wrapper.h
index 222eb80f7f39ce42d9ff2a5cf5e4a9b7c1b4e364..4364f8cbca8671fbc022e5d724f333abdc541534 100644
--- a/paddle/fluid/lite/x86/target_wrapper.h
+++ b/paddle/fluid/lite/x86/target_wrapper.h
@@ -16,9 +16,7 @@
 #include "paddle/fluid/lite/core/target_wrapper.h"
 
 namespace paddle {
-namespace framework {
 namespace lite {
 namespace x86 {}  // namespace x86
 }  // namespace lite
-}  // namespace framework
 }  // namespace paddle