diff --git a/lite/backends/bm/CMakeLists.txt b/lite/backends/bm/CMakeLists.txt
index 9e15b9836b875cec8b5e129ad0f6aceb85ff9d33..d559a84fde987042896cec074207b0d80927d379 100644
--- a/lite/backends/bm/CMakeLists.txt
+++ b/lite/backends/bm/CMakeLists.txt
@@ -3,3 +3,4 @@ if (NOT LITE_WITH_BM)
 endif()
 
 lite_cc_library(target_wrapper_bm SRCS target_wrapper.cc DEPS ${bm_runtime_libs})
+lite_cc_library(device_info_bm SRCS device_info.cc)
diff --git a/lite/backends/bm/device_info.cc b/lite/backends/bm/device_info.cc
new file mode 100644
index 0000000000000000000000000000000000000000..910ed96aae1ec1e6dc976d4227a07c945f3888aa
--- /dev/null
+++ b/lite/backends/bm/device_info.cc
@@ -0,0 +1,55 @@
+// 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.
+
+// Parts of the following code in this file refs to
+// https://github.com/Tencent/ncnn/blob/master/src/cpu.cpp
+// Tencent is pleased to support the open source community by making ncnn
+// available.
+//
+// Copyright (C) 2017 THL A29 Limited, a Tencent company. All rights reserved.
+//
+// Licensed under the BSD 3-Clause License (the "License"); you may not use this
+// file except in compliance with the License. You may obtain a copy of the
+// License at
+//
+// https://opensource.org/licenses/BSD-3-Clause
+//
+// 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 "lite/backends/bm/device_info.h"
+#include <algorithm>
+#include <limits>
+
+namespace paddle {
+namespace lite {
+
+#ifdef LITE_WITH_BM
+void Device<TARGET(kBM)>::SetId(int device_id) {
+  LOG(INFO) << "Set bm device " << device_id;
+  TargetWrapper<TARGET(kBM)>::SetDevice(device_id);
+  idx_ = device_id;
+}
+
+void Device<TARGET(kBM)>::Init() { SetId(idx_); }
+int Device<TARGET(kBM)>::core_num() {
+  return TargetWrapper<TARGET(kBM)>::num_devices();
+}
+#endif  // LITE_WITH_BM
+
+}  // namespace lite
+}  // namespace paddle
diff --git a/lite/backends/bm/device_info.h b/lite/backends/bm/device_info.h
new file mode 100644
index 0000000000000000000000000000000000000000..89668b368e06fbc6e7f5d1e03b4289ac90855d0d
--- /dev/null
+++ b/lite/backends/bm/device_info.h
@@ -0,0 +1,70 @@
+// 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 <cstdarg>
+#include <string>
+#include <vector>
+#include "lite/core/device_info.h"
+#include "lite/core/tensor.h"
+#include "lite/utils/cp_logging.h"
+
+namespace paddle {
+namespace lite {
+
+#ifdef LITE_WITH_BM
+template <>
+class Device<TARGET(kBM)> {
+ public:
+  Device(int dev_id, int max_stream = 1)
+      : idx_(dev_id), max_stream_(max_stream) {}
+  void Init();
+
+  int id() { return idx_; }
+  int max_stream() { return 1; }
+  std::string name() { return "BM"; }
+  float max_memory() { return 16; }
+  int core_num();
+  void SetId(int idx);
+
+  int sm_version() { return 0; }
+  bool has_fp16() { return false; }
+  bool has_int8() { return false; }
+  bool has_hmma() { return false; }
+  bool has_imma() { return false; }
+  int runtime_version() { return 0; }
+
+ private:
+  void CreateQueue() {}
+  void GetInfo() {}
+
+ private:
+  int idx_{0};
+  int max_stream_{1};
+  std::string device_name_;
+  float max_memory_;
+
+  int sm_version_;
+  bool has_fp16_;
+  bool has_int8_;
+  bool has_hmma_;
+  bool has_imma_;
+  int runtime_version_;
+};
+
+template class Env<TARGET(kBM)>;
+#endif
+}  // namespace lite
+}  // namespace paddle
diff --git a/lite/core/device_info.cc b/lite/core/device_info.cc
index ac79ede37406188f495690179b4a4886bc009d80..09da06a4168268c670577c159a2a306a8959d81d 100644
--- a/lite/core/device_info.cc
+++ b/lite/core/device_info.cc
@@ -1240,19 +1240,6 @@ void Device<TARGET(kMLU)>::CreateQueue() {
 }
 #endif  // LITE_WITH_MLU
 
-#ifdef LITE_WITH_BM
-void Device<TARGET(kBM)>::SetId(int device_id) {
-  LOG(INFO) << "Set bm device " << device_id;
-  TargetWrapper<TARGET(kBM)>::SetDevice(device_id);
-  idx_ = device_id;
-}
-
-void Device<TARGET(kBM)>::Init() { SetId(idx_); }
-int Device<TARGET(kBM)>::core_num() {
-  return TargetWrapper<TARGET(kBM)>::num_devices();
-}
-#endif  // LITE_WITH_BM
-
 #ifdef LITE_WITH_CUDA
 
 void Device<TARGET(kCUDA)>::Init() {
diff --git a/lite/core/device_info.h b/lite/core/device_info.h
index f5b75039ea14f67cee9d009261b2dd1fc6b46825..b06eb8d944735971133bb7a29aa0f06075e60626 100644
--- a/lite/core/device_info.h
+++ b/lite/core/device_info.h
@@ -221,49 +221,6 @@ class Device<TARGET(kMLU)> {
 template class Env<TARGET(kMLU)>;
 #endif  // LITE_WITH_MLU
 
-#ifdef LITE_WITH_BM
-template <>
-class Device<TARGET(kBM)> {
- public:
-  Device(int dev_id, int max_stream = 1)
-      : idx_(dev_id), max_stream_(max_stream) {}
-  void Init();
-
-  int id() { return idx_; }
-  int max_stream() { return 1; }
-  std::string name() { return "BM"; }
-  float max_memory() { return 16; }
-  int core_num();
-  void SetId(int idx);
-
-  int sm_version() { return 0; }
-  bool has_fp16() { return false; }
-  bool has_int8() { return false; }
-  bool has_hmma() { return false; }
-  bool has_imma() { return false; }
-  int runtime_version() { return 0; }
-
- private:
-  void CreateQueue() {}
-  void GetInfo() {}
-
- private:
-  int idx_{0};
-  int max_stream_{1};
-  std::string device_name_;
-  float max_memory_;
-
-  int sm_version_;
-  bool has_fp16_;
-  bool has_int8_;
-  bool has_hmma_;
-  bool has_imma_;
-  int runtime_version_;
-};
-
-template class Env<TARGET(kBM)>;
-#endif
-
 #ifdef LITE_WITH_CUDA
 template <>
 class Device<TARGET(kCUDA)> {
diff --git a/lite/kernels/bm/CMakeLists.txt b/lite/kernels/bm/CMakeLists.txt
index 691fe55978a211b32f804d91f70efb6f3f27f303..d7b21bf097504f0765a5a7f7b2f7fe30d1d3f65b 100644
--- a/lite/kernels/bm/CMakeLists.txt
+++ b/lite/kernels/bm/CMakeLists.txt
@@ -3,4 +3,4 @@ if(NOT LITE_WITH_BM)
 endif()
 
 add_subdirectory(bridges)
-add_kernel(subgraph_compute_bm BM basic SRCS subgraph_compute.cc DEPS ${lite_kernel_deps} ${bm_subgraph_bridges})
+add_kernel(subgraph_compute_bm BM basic SRCS subgraph_compute.cc DEPS ${lite_kernel_deps} ${bm_subgraph_bridges} device_info_bm)