diff --git a/middleware/IpcConfig/src/IpcConfig.cpp b/middleware/IpcConfig/src/IpcConfig.cpp
index d7451417..1e28df9f 100644
--- a/middleware/IpcConfig/src/IpcConfig.cpp
+++ b/middleware/IpcConfig/src/IpcConfig.cpp
@@ -16,6 +16,8 @@
 #include "ILog.h"
 #include <string.h>
 
+#define CHECK_MAP(map) (map.size()==1? true:false)
+
 IpcConfig::IpcConfig()
 {
     mCfgChanged = CONFIG_HAS_NOT_CHANGED;
@@ -26,12 +28,13 @@ IpcConfig::IpcConfig()
             IpcConfigKey::TEST_NUM,
             std::reference_wrapper<int>(mAllData.testNum)));
 
-    mCfgMapString.insert(
-        std::make_pair<
-            IpcConfigKey,
-            std::reference_wrapper<CHAR_STRING>>(
-            IpcConfigKey::TEST_STRING,
+    std::map<std::string, std::reference_wrapper<CHAR_STRING>> innerMap;
+    innerMap.insert(
+        std::make_pair(
+            "test_string",
             std::reference_wrapper<CHAR_STRING>(mAllData.testString)));
+    mCfgMapString.insert(std::make_pair(IpcConfigKey::TEST_STRING, innerMap));
+
 }
 const StatusCode IpcConfig::Init(void)
 {
@@ -296,26 +299,26 @@ void IpcConfig::SetBool(const IpcConfigKey &key, const bool &value)
 }
 const std::string IpcConfig::GetString(const IpcConfigKey &key)
 {
-    std::map<IpcConfigKey, std::reference_wrapper<CHAR_STRING>>::iterator iter;
+    std::map<IpcConfigKey, std::map<std::string, std::reference_wrapper<CHAR_STRING>>>::iterator iter;
     iter = mCfgMapString.find(key);
-    if (iter != mCfgMapString.end())
+    if (iter != mCfgMapString.end() && CHECK_MAP(iter->second))
     {
-        std::reference_wrapper<CHAR_STRING> s = iter->second;
-        const std::string sv(s);
+        const std::string sv(iter->second.begin()->second);     // char[] --> const std::strinbg
         return sv;
     }
     LogError("Can't find the key.\n");
     const std::string UNKNOWN_CONFIG = "undefine";
     return UNKNOWN_CONFIG;
 }
-
 void IpcConfig::SetString(const IpcConfigKey &key, const std::string string)
 {
-    std::map<IpcConfigKey, std::reference_wrapper<CHAR_STRING>>::iterator iter;
+    std::map<IpcConfigKey, std::map<std::string, std::reference_wrapper<CHAR_STRING>>>::iterator iter;
     iter = mCfgMapString.find(key);
-    if (iter != mCfgMapString.end())
+    if (iter != mCfgMapString.end() && CHECK_MAP(iter->second))
     {
-        strncpy(iter->second, string.c_str(), sizeof(CHAR_STRING));
+        strncpy(iter->second.begin()->second, string.c_str(), sizeof(CHAR_STRING));     // const std::strinbg --> char[]
+        const char * name = iter->second.begin()->first.c_str();    // const std::strinbg --> const char *
+        ConfigSetString(mCfg, name, iter->second.begin()->second);
         mCfgChanged = CONFIG_HAS_CHANGED;
     }
     else
@@ -335,7 +338,6 @@ void IpcConfig::ReadAllConfigParameters(void)
         mAllData.testNum = DEFAULT_TEST_NUM;
         ConfigSetInt(mCfg, "test_num", mAllData.testNum);
     }
-
     const char *testString = NULL;
     StatusCode string_code = ConfigGetString(mCfg, "test_string", &(testString));
     if (StatusCodeEqual(string_code, "CONFIG_CODE_PARAM_NOT_EXIST"))
diff --git a/middleware/IpcConfig/src/IpcConfig.h b/middleware/IpcConfig/src/IpcConfig.h
index d21517c5..6bad3232 100644
--- a/middleware/IpcConfig/src/IpcConfig.h
+++ b/middleware/IpcConfig/src/IpcConfig.h
@@ -80,6 +80,6 @@ private:
     std::map<IpcConfigKey, std::reference_wrapper<double>> mCfgMapDouble;
     std::map<IpcConfigKey, std::reference_wrapper<long double>> mCfgMapLongDouble;
     std::map<IpcConfigKey, std::reference_wrapper<bool>> mCfgMapBool;
-    std::map<IpcConfigKey, std::reference_wrapper<CHAR_STRING>> mCfgMapString;
+    std::map<IpcConfigKey, std::map<std::string, std::reference_wrapper<CHAR_STRING>>> mCfgMapString;
 };
 #endif
\ No newline at end of file