diff --git a/middleware/IpcConfig/include/IIpcConfig.h b/middleware/IpcConfig/include/IIpcConfig.h
index 9783c50..1f37241 100644
--- a/middleware/IpcConfig/include/IIpcConfig.h
+++ b/middleware/IpcConfig/include/IIpcConfig.h
@@ -27,6 +27,7 @@ enum class IpcConfigKey
     TEST_LLONG,
     TEST_CHAR,
     TEST_BOOL,
+    TEST_DOUBLE,
     TEST_STRING,
     END
 };
diff --git a/middleware/IpcConfig/src/IpcConfig.cpp b/middleware/IpcConfig/src/IpcConfig.cpp
index b1d9650..2716fb6 100644
--- a/middleware/IpcConfig/src/IpcConfig.cpp
+++ b/middleware/IpcConfig/src/IpcConfig.cpp
@@ -46,6 +46,10 @@ IpcConfig::IpcConfig()
     innerMapBool.insert(std::make_pair("test_bool", std::reference_wrapper<bool>(mAllData.testBool)));
     mCfgMapBool.insert(std::make_pair(IpcConfigKey::TEST_BOOL, innerMapBool));
 
+    std::map<std::string, std::reference_wrapper<double>> innerMapDouble;
+    innerMapDouble.insert(std::make_pair("test_double", std::reference_wrapper<double>(mAllData.testDouble)));
+    mCfgMapDouble.insert(std::make_pair(IpcConfigKey::TEST_DOUBLE, innerMapDouble));
+
     std::map<std::string, std::reference_wrapper<CHAR_STRING>> innerMapString;
     innerMapString.insert(std::make_pair("test_string", std::reference_wrapper<CHAR_STRING>(mAllData.testString)));
     mCfgMapString.insert(std::make_pair(IpcConfigKey::TEST_STRING, innerMapString));
@@ -222,21 +226,23 @@ void IpcConfig::SetFloat(const IpcConfigKey &key, const float &value)
 }
 const double IpcConfig::GetDouble(const IpcConfigKey &key)
 {
-    std::map<IpcConfigKey, std::reference_wrapper<double>>::iterator iter;
+    std::map<IpcConfigKey, std::map<std::string, std::reference_wrapper<double>>>::iterator iter;
     iter = mCfgMapDouble.find(key);
-    if (iter != mCfgMapDouble.end()) {
-        return iter->second;
+    if (iter != mCfgMapDouble.end() && CHECK_MAP(iter->second)) {
+        return iter->second.begin()->second;
     }
     LogError("Can't find the key.\n");
-    constexpr double UNKNOWN_CONFIG = -1.0;
+    constexpr double UNKNOWN_CONFIG = -1.00;
     return UNKNOWN_CONFIG;
 }
 void IpcConfig::SetDouble(const IpcConfigKey &key, const double &value)
 {
-    std::map<IpcConfigKey, std::reference_wrapper<double>>::iterator iter;
+    std::map<IpcConfigKey, std::map<std::string, std::reference_wrapper<double>>>::iterator iter;
     iter = mCfgMapDouble.find(key);
-    if (iter != mCfgMapDouble.end()) {
-        iter->second.get() = value;
+    if (iter != mCfgMapDouble.end() && CHECK_MAP(iter->second)) {
+        iter->second.begin()->second.get() = value;
+        const char *name = iter->second.begin()->first.c_str(); // const std::strinbg --> const char *
+        ConfigSetDouble(mCfg, name, iter->second.begin()->second);
         mCfgChanged = CONFIG_HAS_CHANGED;
     }
     else {
@@ -374,6 +380,15 @@ void IpcConfig::ReadAllConfigParameters(void)
         ConfigSetBool(mCfg, "test_bool", mAllData.testBool);
     }
 
+    StatusCode doubleCode = ConfigGetDouble(mCfg, "test_double", &(mAllData.testDouble));
+    if (StatusCodeEqual(doubleCode, "CONFIG_CODE_PARAM_NOT_EXIST")) {
+        LogWarning("test_double doesn't exist, will make it as default.\n");
+        mCfgChanged = CONFIG_HAS_CHANGED;
+        constexpr double DEFAULT_TEST_DOUBLE_NUM = 3.123456789;
+        mAllData.testDouble = DEFAULT_TEST_DOUBLE_NUM;
+        ConfigSetDouble(mCfg, "test_double", mAllData.testDouble);
+    }
+
     const char *testString = NULL;
     StatusCode stringCode = ConfigGetString(mCfg, "test_string", &(testString));
     if (StatusCodeEqual(stringCode, "CONFIG_CODE_PARAM_NOT_EXIST")) {
diff --git a/middleware/IpcConfig/src/IpcConfig.h b/middleware/IpcConfig/src/IpcConfig.h
index 55b9ad8..70ed224 100644
--- a/middleware/IpcConfig/src/IpcConfig.h
+++ b/middleware/IpcConfig/src/IpcConfig.h
@@ -31,6 +31,7 @@ typedef struct Config_s
     long long testLLong;
     char testChar;
     bool testBool;
+    double testDouble;
     CHAR_STRING testString;
 } Config_s;
 class MapInt
@@ -81,7 +82,7 @@ private:
     std::map<IpcConfigKey, std::map<std::string, std::reference_wrapper<long long>>> mCfgMapLLong;
     std::map<IpcConfigKey, std::map<std::string, std::reference_wrapper<char>>> mCfgMapChar;
     std::map<IpcConfigKey, std::reference_wrapper<float>> mCfgMapFloat;
-    std::map<IpcConfigKey, std::reference_wrapper<double>> mCfgMapDouble;
+    std::map<IpcConfigKey, std::map<std::string, std::reference_wrapper<double>>> mCfgMapDouble;
     std::map<IpcConfigKey, std::reference_wrapper<long double>> mCfgMapLongDouble;
     std::map<IpcConfigKey, std::map<std::string, std::reference_wrapper<bool>>> mCfgMapBool;
     std::map<IpcConfigKey, std::map<std::string, std::reference_wrapper<CHAR_STRING>>> mCfgMapString;
diff --git a/test/middleware/IpcConfig/src/IpcConfig_Test.cpp b/test/middleware/IpcConfig/src/IpcConfig_Test.cpp
index 283fe07..5ef50af 100644
--- a/test/middleware/IpcConfig/src/IpcConfig_Test.cpp
+++ b/test/middleware/IpcConfig/src/IpcConfig_Test.cpp
@@ -41,6 +41,11 @@ TEST(IpcConfigTest, Demo)
     const bool numBool = false;
     IIpcConfig::GetInstance()->SetBool(IpcConfigKey::TEST_BOOL, numBool);
 
+    double testDouble = IIpcConfig::GetInstance()->GetDouble(IpcConfigKey::TEST_DOUBLE);
+    LogInfo("Get test_double = %le\n", testDouble);
+    const double numDouble = 2.123456789;
+    IIpcConfig::GetInstance()->SetDouble(IpcConfigKey::TEST_DOUBLE, numDouble);
+
     const std::string testString = IIpcConfig::GetInstance()->GetString(IpcConfigKey::TEST_STRING);
     LogInfo("Get testString = %s\n", testString.c_str());
     const std::string string = "define";
diff --git a/utils/Config/include/Config.h b/utils/Config/include/Config.h
index e9b085e..b497759 100644
--- a/utils/Config/include/Config.h
+++ b/utils/Config/include/Config.h
@@ -38,6 +38,8 @@ typedef struct v_config
     const StatusCode (*set_char)(VConfig *, const char *, const char);
     const StatusCode (*get_bool)(VConfig *, const char *, bool *);
     const StatusCode (*set_bool)(VConfig *, const char *, const bool);
+    const StatusCode (*get_double)(VConfig *, const char *, double *);
+    const StatusCode (*set_double)(VConfig *, const char *, const double);
     const StatusCode (*get_string)(VConfig *, const char *, const char **);
     const StatusCode (*set_string)(VConfig *, const char *, const char *);
     const StatusCode (*save)(VConfig *);
@@ -57,10 +59,10 @@ const StatusCode ConfigGetLLong(VConfig *cfg, const char *name, long long *value
 const StatusCode ConfigSetLLong(VConfig *cfg, const char *name, const long long value);
 const StatusCode ConfigGetChar(VConfig *cfg, const char *name, char *value);
 const StatusCode ConfigSetChar(VConfig *cfg, const char *name, const char value);
-
 const StatusCode ConfigGetBool(VConfig *cfg, const char *name, bool *value);
 const StatusCode ConfigSetBool(VConfig *cfg, const char *name, const bool value);
-
+const StatusCode ConfigGetDouble(VConfig *cfg, const char *name, double *value);
+const StatusCode ConfigSetDouble(VConfig *cfg, const char *name, const double value);
 const StatusCode ConfigGetString(VConfig *cfg, const char *name, const char **value);
 const StatusCode ConfigSetString(VConfig *cfg, const char *name, const char *value);
 #ifdef __cplusplus
diff --git a/utils/Config/src/Config.c b/utils/Config/src/Config.c
index 9c5ee8c..aea0077 100644
--- a/utils/Config/src/Config.c
+++ b/utils/Config/src/Config.c
@@ -118,6 +118,21 @@ const StatusCode ConfigSetBool(VConfig *cfg, const char *name, const bool value)
     }
     return cfg->set_bool(cfg, name, value);
 }
+const StatusCode ConfigGetDouble(VConfig *cfg, const char *name, double *value)
+{
+    if (NULL == cfg) {
+        return CreateStatusCode(STATUS_CODE_NOT_OK);
+    }
+    return cfg->get_double(cfg, name, value);
+}
+const StatusCode ConfigSetDouble(VConfig *cfg, const char *name, const double value)
+{
+    if (NULL == cfg) {
+        return CreateStatusCode(STATUS_CODE_NOT_OK);
+    }
+    return cfg->set_double(cfg, name, value);
+}
+
 const StatusCode ConfigGetString(VConfig *cfg, const char *name, const char **value)
 {
     if (NULL == cfg) {
diff --git a/utils/Config/src/ConfigImpl.c b/utils/Config/src/ConfigImpl.c
index db3c040..88ec389 100644
--- a/utils/Config/src/ConfigImpl.c
+++ b/utils/Config/src/ConfigImpl.c
@@ -176,6 +176,28 @@ static const StatusCode ConfigSetBoolImpl(VConfig *cfg, const char *name, const
     config_setting_set_bool(setting, (int)value);
     return CreateStatusCode(STATUS_CODE_OK);
 }
+
+static const StatusCode ConfigGetDoubleImpl(VConfig *cfg, const char *name, double *value)
+{
+    int result = 0;
+    result = config_lookup_float(&(((Config *)cfg)->cfg), name, value);
+    if (CONFIG_FALSE == result) {
+        return CreateConfigCode(CONFIG_CODE_PARAM_NOT_EXIST);
+    }
+    return CreateStatusCode(STATUS_CODE_OK);
+}
+static const StatusCode ConfigSetDoubleImpl(VConfig *cfg, const char *name, const double value)
+{
+    config_setting_t *root, *setting;
+    root = config_root_setting(&(((Config *)cfg)->cfg));
+    setting = config_setting_get_member(root, name);
+    if (!setting) {
+        setting = config_setting_add(root, name, CONFIG_TYPE_FLOAT);
+    }
+    config_setting_set_float(setting, value);
+    return CreateStatusCode(STATUS_CODE_OK);
+}
+
 static const StatusCode ConfigGetStringImpl(VConfig *cfg, const char *name, const char **value)
 {
     int result = 0;
@@ -217,6 +239,8 @@ static void ConfigImplInit(Config *cfg)
     cfg->base.set_char = ConfigSetCharImpl;
     cfg->base.get_bool = ConfigGetBoolImpl;
     cfg->base.set_bool = ConfigSetBoolImpl;
+    cfg->base.get_double = ConfigGetDoubleImpl;
+    cfg->base.set_double = ConfigSetDoubleImpl;
     cfg->base.get_string = ConfigGetStringImpl;
     cfg->base.set_string = ConfigSetStringImpl;
     cfg->base.save = ConfigSaveFileImpl;