diff --git a/CMakeLists.txt b/CMakeLists.txt
index 064e6b2076302eb72c6d02669a4de1a8b6be729a..452135915dad746d9fea9ac63d65ffdac193fc82 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -25,16 +25,16 @@ include_directories(${PROJECT_SOURCE_DIR})
 include_directories(${CMAKE_CURRENT_BINARY_DIR})
 include_directories(${PROJECT_SOURCE_DIR}/thirdparty/local/include)
 
-add_subdirectory(${CMAKE_CURRENT_SOURCE_DIR}/visualdl/backend/storage)
-add_subdirectory(${CMAKE_CURRENT_SOURCE_DIR}/visualdl/backend/logic)
+add_subdirectory(${CMAKE_CURRENT_SOURCE_DIR}/visualdl/storage)
+add_subdirectory(${CMAKE_CURRENT_SOURCE_DIR}/visualdl/logic)
 
 add_executable(vl_test
-        ${PROJECT_SOURCE_DIR}/visualdl/backend/test.cc
-        ${PROJECT_SOURCE_DIR}/visualdl/backend/storage/storage_test.cc
-        ${PROJECT_SOURCE_DIR}/visualdl/backend/utils/test_concurrency.cc
-        ${PROJECT_SOURCE_DIR}/visualdl/backend/logic/im_test.cc
-        ${PROJECT_SOURCE_DIR}/visualdl/backend/utils/concurrency.h
-        ${PROJECT_SOURCE_DIR}/visualdl/backend/utils/filesystem.h
+        ${PROJECT_SOURCE_DIR}/visualdl/test.cc
+        ${PROJECT_SOURCE_DIR}/visualdl/storage/storage_test.cc
+        ${PROJECT_SOURCE_DIR}/visualdl/utils/test_concurrency.cc
+        ${PROJECT_SOURCE_DIR}/visualdl/logic/im_test.cc
+        ${PROJECT_SOURCE_DIR}/visualdl/utils/concurrency.h
+        ${PROJECT_SOURCE_DIR}/visualdl/utils/filesystem.h
         )
 target_link_libraries(vl_test storage im gtest glog protobuf gflags pthread)
 
diff --git a/visualdl/logic/CMakeLists.txt b/visualdl/logic/CMakeLists.txt
index b28e299a98afe9970d6f9e654ecae39f95f8a6b7..8b8045246a23cd8c077c7976c393e254aa8e84de 100644
--- a/visualdl/logic/CMakeLists.txt
+++ b/visualdl/logic/CMakeLists.txt
@@ -1,7 +1,7 @@
-add_library(sdk ${PROJECT_SOURCE_DIR}/visualdl/backend/logic/sdk.cc)
-add_library(im ${PROJECT_SOURCE_DIR}/visualdl/backend/logic/im.cc)
+add_library(sdk ${PROJECT_SOURCE_DIR}/visualdl/logic/sdk.cc)
+add_library(im ${PROJECT_SOURCE_DIR}/visualdl/logic/im.cc)
 
 ## pybind
-add_library(core SHARED ${PROJECT_SOURCE_DIR}/visualdl/backend/logic/pybind.cc)
+add_library(core SHARED ${PROJECT_SOURCE_DIR}/visualdl/logic/pybind.cc)
 add_dependencies(core pybind python im storage sdk protobuf glog)
 target_link_libraries(core PRIVATE pybind python im storage sdk protobuf glog)
diff --git a/visualdl/logic/im.cc b/visualdl/logic/im.cc
index 305fb42c73cf4c6992a7d7fbd71ccbb00f7f7a5d..76d55d225bafe1754d14c351436bfde97041665e 100644
--- a/visualdl/logic/im.cc
+++ b/visualdl/logic/im.cc
@@ -1,7 +1,7 @@
 #include <glog/logging.h>
 #include <ctime>
 
-#include "visualdl/backend/logic/im.h"
+#include "visualdl/logic/im.h"
 
 namespace visualdl {
 
diff --git a/visualdl/logic/im.h b/visualdl/logic/im.h
index de884b0a890a97025e90a90342909e9b33a6ba18..5df59e2994807cdfe4a0a5e746f8bbc264759433 100644
--- a/visualdl/logic/im.h
+++ b/visualdl/logic/im.h
@@ -1,12 +1,12 @@
-#ifndef VISUALDL_BACKEND_LOGIC_IM_H
-#define VISUALDL_BACKEND_LOGIC_IM_H
+#ifndef VISUALDL_LOGIC_IM_H
+#define VISUALDL_LOGIC_IM_H
 
 #include <glog/logging.h>
-#include <visualdl/backend/utils/concurrency.h>
 #include <memory>
 #include <string>
 
-#include "visualdl/backend/storage/storage.h"
+#include "visualdl/storage/storage.h"
+#include "visualdl/utils/concurrency.h"
 
 namespace visualdl {
 
diff --git a/visualdl/logic/im_test.cc b/visualdl/logic/im_test.cc
index c387565477ee9df0ae8d2872ae6416f79e08ca7e..deaab5e4704063cabb652b1a7940d6321ae93adb 100644
--- a/visualdl/logic/im_test.cc
+++ b/visualdl/logic/im_test.cc
@@ -1,4 +1,4 @@
-#include "visualdl/backend/logic/im.h"
+#include "visualdl/logic/im.h"
 
 #include "gtest/gtest.h"
 
diff --git a/visualdl/logic/pybind.cc b/visualdl/logic/pybind.cc
index 4b114a53344c91102876b008f95c77ee797bfe05..7a79429a7dde5f11a9690ab326eb2cf2129610d6 100644
--- a/visualdl/logic/pybind.cc
+++ b/visualdl/logic/pybind.cc
@@ -2,7 +2,7 @@
 #include <pybind11/pybind11.h>
 #include <pybind11/stl.h>
 
-#include "visualdl/backend/logic/sdk.h"
+#include "visualdl/logic/sdk.h"
 
 namespace py = pybind11;
 namespace vs = visualdl;
diff --git a/visualdl/logic/sdk.cc b/visualdl/logic/sdk.cc
index b5bebe56d17dcc454560158bade5360f725df07a..513541511d48adc00e1a95f5bf51974fb0b1988f 100644
--- a/visualdl/logic/sdk.cc
+++ b/visualdl/logic/sdk.cc
@@ -1,4 +1,5 @@
-#include "visualdl/backend/logic/sdk.h"
+#include "visualdl/logic/sdk.h"
+
 #include <google/protobuf/text_format.h>
 
 namespace visualdl {
diff --git a/visualdl/logic/sdk.h b/visualdl/logic/sdk.h
index 9948ab709896784cea1c9294a2e4fac0586cee99..3937ffafbb91ac2792cb88a242a3833fa2bfc3e4 100644
--- a/visualdl/logic/sdk.h
+++ b/visualdl/logic/sdk.h
@@ -1,11 +1,11 @@
-#ifndef VISUALDL_BACKEND_LOGIC_SDK_H
-#define VISUALDL_BACKEND_LOGIC_SDK_H
+#ifndef VISUALDL_LOGIC_SDK_H
+#define VISUALDL_LOGIC_SDK_H
 
 #include <glog/logging.h>
 #include <time.h>
 #include <map>
 
-#include "visualdl/backend/logic/im.h"
+#include "visualdl/logic/im.h"
 
 namespace visualdl {
 
diff --git a/visualdl/storage/storage.h b/visualdl/storage/storage.h
index a827a6dbd8d936ff6f9c8de9c95289cd8cbff0ee..2787d9af87a9547921531b7dc509798a70001b71 100644
--- a/visualdl/storage/storage.h
+++ b/visualdl/storage/storage.h
@@ -5,7 +5,7 @@
 #include <map>
 #include <string>
 
-#include "visualdl/backend/storage/storage.pb.h"
+#include "visualdl/storage/storage.pb.h"
 
 namespace visualdl {