diff --git a/include/libs/config/config.h b/include/libs/config/config.h
index fb484ff37941cadfbbf04bbdf9e9a275785c0962..a04ebad9812195396a79add02299ee8b2bbfbc8e 100644
--- a/include/libs/config/config.h
+++ b/include/libs/config/config.h
@@ -24,7 +24,7 @@ extern "C" {
 #endif
 
 typedef enum {
-  CFG_TYPE_NONE,
+  CFG_TYPE_DEFAULT,
   CFG_TYPE_TAOS_CFG,
   CFG_TYPE_DOT_ENV,
   CFG_TYPE_ENV_VAR,
@@ -33,8 +33,8 @@ typedef enum {
 } ECfgType;
 
 typedef enum {
-  CFG_DYPE_NONE,
-  CFG_DYPE_BOOL,
+  CFG_DTYPE_NONE,
+  CFG_DTYPE_BOOL,
   CFG_DTYPE_INT8,
   CFG_DTYPE_UINT8,
   CFG_DTYPE_INT16,
@@ -62,6 +62,31 @@ typedef enum {
   CFG_UTYPE_MS
 } ECfgUnitType;
 
+typedef struct SConfigItem {
+  ECfgType     stype;
+  ECfgUnitType utype;
+  ECfgDataType dtype;
+  const char  *name;
+  union {
+    bool     boolVal;
+    uint8_t  uint8Val;
+    int8_t   int8Val;
+    uint16_t uint16Val;
+    int16_t  int16Val;
+    uint32_t uint32Val;
+    int32_t  int32Val;
+    uint64_t uint64Val;
+    int64_t  int64Val;
+    float    floatVal;
+    double   doubleVal;
+    char    *strVal;
+    char    *fqdnVal;
+    char    *ipstrVal;
+    char    *dirVal;
+    char    *fileVal;
+  };
+} SConfigItem;
+
 typedef struct SConfig SConfig;
 
 SConfig *cfgInit();
@@ -69,44 +94,26 @@ int32_t  cfgLoad(SConfig *pConfig, ECfgType cfgType, const char *sourceStr);
 void     cfgCleanup(SConfig *pConfig);
 
 int32_t      cfgGetSize(SConfig *pConfig);
-void        *cfgIterate(SConfig *pConfig, void *p);
-void         cfgCancelIterate(SConfig *pConfig, void *p);
-ECfgUnitType cfgGetUtype(SConfig *pConfig, const char *name);
-ECfgDataType cfgGetDtype(SConfig *pConfig, const char *name);
-
-void cfgAddBool(SConfig *pConfig, const char *name, bool defaultVal, ECfgUnitType utype);
-void cfgAddInt8(SConfig *pConfig, const char *name, int8_t defaultVal, ECfgUnitType utype);
-void cfgAddUInt8(SConfig *pConfig, const char *name, uint8_t defaultVal, ECfgUnitType utype);
-void cfgAddInt16(SConfig *pConfig, const char *name, int16_t defaultVal, ECfgUnitType utype);
-void cfgAddUInt16(SConfig *pConfig, const char *name, uint16_t defaultVal, ECfgUnitType utype);
-void cfgAddInt32(SConfig *pConfig, const char *name, int32_t defaultVal, ECfgUnitType utype);
-void cfgAddUInt32(SConfig *pConfig, const char *name, uint32_t defaultVal, ECfgUnitType utype);
-void cfgAddInt64(SConfig *pConfig, const char *name, int64_t defaultVal, ECfgUnitType utype);
-void cfgAddUInt64(SConfig *pConfig, const char *name, uint64_t defaultVal, ECfgUnitType utype);
-void cfgAddFloat(SConfig *pConfig, const char *name, float defaultVal, ECfgUnitType utype);
-void cfgAddDouble(SConfig *pConfig, const char *name, double defaultVal, ECfgUnitType utype);
-void cfgAddString(SConfig *pConfig, const char *name, const char *defaultVal, ECfgUnitType utype);
-void cfgAddFqdn(SConfig *pConfig, const char *name, const char *defaultVal, ECfgUnitType utype);
-void cfgAddIpStr(SConfig *pConfig, const char *name, const char *defaultVal, ECfgUnitType utype);
-void cfgAddDir(SConfig *pConfig, const char *name, const char *defaultVal, ECfgUnitType utype);
-void cfgAddFile(SConfig *pConfig, const char *name, const char *defaultVal, ECfgUnitType utype);
+SConfigItem *cfgIterate(SConfig *pConfig, SConfigItem *pIter);
+void         cfgCancelIterate(SConfig *pConfig, SConfigItem *pIter);
+SConfigItem *cfgGetItem(SConfig *pConfig, const char *name);
 
-bool        cfgGetBool(SConfig *pConfig, const char *name);
-int8_t      cfgGetInt8(SConfig *pConfig, const char *name);
-uint8_t     cfgGetUInt8(SConfig *pConfig, const char *name);
-int16_t     cfgGetInt16(SConfig *pConfig, const char *name);
-uint16_t    cfgGetUInt16(SConfig *pConfig, const char *name);
-int32_t     cfgGetInt32(SConfig *pConfig, const char *name);
-uint32_t    cfgGetUInt32(SConfig *pConfig, const char *name);
-int64_t     cfgGetInt64(SConfig *pConfig, const char *name);
-uint64_t    cfgGetUInt64(SConfig *pConfig, const char *name);
-float       cfgGetFloat(SConfig *pConfig, const char *name);
-double      cfgGetDouble(SConfig *pConfig, const char *name);
-const char *cfgGetString(SConfig *pConfig, const char *name);
-const char *cfgGetFqdn(SConfig *pConfig, const char *name);
-const char *cfgGetIpStr(SConfig *pConfig, const char *name);
-const char *cfgGetDir(SConfig *pConfig, const char *name);
-const char *cfgGetFile(SConfig *pConfig, const char *name);
+int32_t cfgAddBool(SConfig *pConfig, const char *name, bool defaultVal, ECfgUnitType utype);
+int32_t cfgAddInt8(SConfig *pConfig, const char *name, int8_t defaultVal, ECfgUnitType utype);
+int32_t cfgAddUInt8(SConfig *pConfig, const char *name, uint8_t defaultVal, ECfgUnitType utype);
+int32_t cfgAddInt16(SConfig *pConfig, const char *name, int16_t defaultVal, ECfgUnitType utype);
+int32_t cfgAddUInt16(SConfig *pConfig, const char *name, uint16_t defaultVal, ECfgUnitType utype);
+int32_t cfgAddInt32(SConfig *pConfig, const char *name, int32_t defaultVal, ECfgUnitType utype);
+int32_t cfgAddUInt32(SConfig *pConfig, const char *name, uint32_t defaultVal, ECfgUnitType utype);
+int32_t cfgAddInt64(SConfig *pConfig, const char *name, int64_t defaultVal, ECfgUnitType utype);
+int32_t cfgAddUInt64(SConfig *pConfig, const char *name, uint64_t defaultVal, ECfgUnitType utype);
+int32_t cfgAddFloat(SConfig *pConfig, const char *name, float defaultVal, ECfgUnitType utype);
+int32_t cfgAddDouble(SConfig *pConfig, const char *name, double defaultVal, ECfgUnitType utype);
+int32_t cfgAddString(SConfig *pConfig, const char *name, const char *defaultVal, ECfgUnitType utype);
+int32_t cfgAddFqdn(SConfig *pConfig, const char *name, const char *defaultVal, ECfgUnitType utype);
+int32_t cfgAddIpStr(SConfig *pConfig, const char *name, const char *defaultVal, ECfgUnitType utype);
+int32_t cfgAddDir(SConfig *pConfig, const char *name, const char *defaultVal, ECfgUnitType utype);
+int32_t cfgAddFile(SConfig *pConfig, const char *name, const char *defaultVal, ECfgUnitType utype);
 
 #ifdef __cplusplus
 }
diff --git a/source/libs/config/inc/cfgInt.h b/source/libs/config/inc/cfgInt.h
index 46ba14ed036e99d74bac97fd41fd1c15f36bcb6e..2c4b05af7fc62a46528aee9d6e26ce36bd92f403 100644
--- a/source/libs/config/inc/cfgInt.h
+++ b/source/libs/config/inc/cfgInt.h
@@ -18,8 +18,8 @@
 #define _TD_CFG_INT_H_
 
 #include "config.h"
+#include "taoserror.h"
 #include "thash.h"
-#include "tlockfree.h"
 #include "ulog.h"
 
 #ifdef __cplusplus
@@ -27,8 +27,7 @@ extern "C" {
 #endif
 
 typedef struct SConfig {
-  ECfgType  loadType;
-  SRWLatch  lock;
+  ECfgType  stype;
   SHashObj *hash;
 } SConfig;
 
diff --git a/source/libs/config/src/config.c b/source/libs/config/src/config.c
index 23fbfc1dc06903613c1ce7112b75c14bd1e3c58b..acebfee32b63de415635ba2b01dde5bf95129f8c 100644
--- a/source/libs/config/src/config.c
+++ b/source/libs/config/src/config.c
@@ -36,10 +36,140 @@ int32_t cfgLoad(SConfig *pConfig, ECfgType cfgType, const char *sourceStr) {
   }
 }
 
-void cfgCleanup(SConfig *pConfig) { free(pConfig); }
+void cfgCleanup(SConfig *pConfig) {
+  if (pConfig == NULL) return;
+  if (pConfig->hash != NULL) {
+    taosHashCleanup(pConfig->hash);
+    pConfig->hash == NULL;
+  }
+}
+
+int32_t cfgGetSize(SConfig *pConfig) { return taosHashGetSize(pConfig->hash); }
+
+SConfigItem *cfgIterate(SConfig *pConfig, SConfigItem *pIter) { return taosHashIterate(pConfig->hash, pIter); }
+
+void cfgCancelIterate(SConfig *pConfig, SConfigItem *pIter) { return taosHashCancelIterate(pConfig->hash, pIter); }
+
+SConfigItem *cfgGetItem(SConfig *pConfig, const char *name) { taosHashGet(pConfig->hash, name, strlen(name) + 1); }
+
+static int32_t cfgAddItem(SConfig *pConfig, SConfigItem *pItem, const char *name, ECfgUnitType utype) {
+  pItem->stype = CFG_TYPE_DEFAULT;
+  pItem->utype = utype;
+  pItem->name = strdup(name);
+  if (pItem->name != NULL) {
+    terrno = TSDB_CODE_OUT_OF_MEMORY;
+    return -1;
+  }
+
+  if (taosHashPut(pConfig->hash, name, strlen(name) + 1, pItem, sizeof(SConfigItem)) != 0) {
+    terrno = TSDB_CODE_OUT_OF_MEMORY;
+    return -1;
+  }
+
+  return 0;
+}
+
+int32_t cfgAddBool(SConfig *pConfig, const char *name, bool defaultVal, ECfgUnitType utype) {
+  SConfigItem item = {.dtype = CFG_DTYPE_BOOL, .boolVal = defaultVal};
+  return cfgAddItem(pConfig, &item, name, utype);
+}
+
+int32_t cfgAddInt8(SConfig *pConfig, const char *name, int8_t defaultVal, ECfgUnitType utype) {
+  SConfigItem item = {.dtype = CFG_DTYPE_INT8, .int8Val = defaultVal};
+  return cfgAddItem(pConfig, &item, name, utype);
+}
+
+int32_t cfgAddUInt8(SConfig *pConfig, const char *name, uint8_t defaultVal, ECfgUnitType utype) {
+  SConfigItem item = {.dtype = CFG_DTYPE_UINT8, .uint8Val = defaultVal};
+  return cfgAddItem(pConfig, &item, name, utype);
+}
+
+int32_t cfgAddInt16(SConfig *pConfig, const char *name, int16_t defaultVal, ECfgUnitType utype) {
+  SConfigItem item = {.dtype = CFG_DTYPE_INT16, .int16Val = defaultVal};
+  return cfgAddItem(pConfig, &item, name, utype);
+}
+
+int32_t cfgAddUInt16(SConfig *pConfig, const char *name, uint16_t defaultVal, ECfgUnitType utype) {
+  SConfigItem item = {.dtype = CFG_DTYPE_UINT16, .uint16Val = defaultVal};
+  return cfgAddItem(pConfig, &item, name, utype);
+}
+
+int32_t cfgAddInt32(SConfig *pConfig, const char *name, int32_t defaultVal, ECfgUnitType utype) {
+  SConfigItem item = {.dtype = CFG_DTYPE_INT32, .int32Val = defaultVal};
+  return cfgAddItem(pConfig, &item, name, utype);
+}
+
+int32_t cfgAddUInt32(SConfig *pConfig, const char *name, uint32_t defaultVal, ECfgUnitType utype) {
+  SConfigItem item = {.dtype = CFG_DTYPE_UINT32, .uint32Val = defaultVal};
+  return cfgAddItem(pConfig, &item, name, utype);
+}
+
+int32_t cfgAddInt64(SConfig *pConfig, const char *name, int64_t defaultVal, ECfgUnitType utype) {
+  SConfigItem item = {.dtype = CFG_DTYPE_INT64, .int64Val = defaultVal};
+  return cfgAddItem(pConfig, &item, name, utype);
+}
+
+int32_t cfgAddUInt64(SConfig *pConfig, const char *name, uint64_t defaultVal, ECfgUnitType utype) {
+  SConfigItem item = {.dtype = CFG_DTYPE_UINT64, .uint64Val = defaultVal};
+  return cfgAddItem(pConfig, &item, name, utype);
+}
+
+int32_t cfgAddFloat(SConfig *pConfig, const char *name, float defaultVal, ECfgUnitType utype) {
+  SConfigItem item = {.dtype = CFG_DTYPE_FLOAT, .floatVal = defaultVal};
+  return cfgAddItem(pConfig, &item, name, utype);
+}
 
-int32_t cfgGetSize(SConfig *pConfig) { return 0; }
+int32_t cfgAddDouble(SConfig *pConfig, const char *name, double defaultVal, ECfgUnitType utype) {
+  SConfigItem item = {.dtype = CFG_DTYPE_DOUBLE, .doubleVal = defaultVal};
+  return cfgAddItem(pConfig, &item, name, utype);
+}
 
-void *cfgIterate(SConfig *pConfig, void *p) { return NULL; }
+int32_t cfgAddString(SConfig *pConfig, const char *name, const char *defaultVal, ECfgUnitType utype) {
+  SConfigItem item = {.dtype = CFG_DTYPE_STRING};
+  item.strVal = strdup(defaultVal);
+  if (item.strVal != NULL) {
+    terrno = TSDB_CODE_OUT_OF_MEMORY;
+    return -1;
+  }
+  return cfgAddItem(pConfig, &item, name, utype);
+}
 
-void cfgCancelIterate(SConfig *pConfig, void *p);
+int32_t cfgAddFqdn(SConfig *pConfig, const char *name, const char *defaultVal, ECfgUnitType utype) {
+  SConfigItem item = {.dtype = CFG_DTYPE_FQDN};
+  item.fqdnVal = strdup(defaultVal);
+  if (item.fqdnVal != NULL) {
+    terrno = TSDB_CODE_OUT_OF_MEMORY;
+    return -1;
+  }
+  return cfgAddItem(pConfig, &item, name, utype);
+}
+
+int32_t cfgAddIpStr(SConfig *pConfig, const char *name, const char *defaultVal, ECfgUnitType utype) {
+  SConfigItem item = {.dtype = CFG_DTYPE_IPSTR};
+  item.ipstrVal = strdup(defaultVal);
+  if (item.ipstrVal != NULL) {
+    terrno = TSDB_CODE_OUT_OF_MEMORY;
+    return -1;
+  }
+  return cfgAddItem(pConfig, &item, name, utype);
+}
+
+int32_t cfgAddDir(SConfig *pConfig, const char *name, const char *defaultVal, ECfgUnitType utype) {
+  SConfigItem item = {.dtype = CFG_DTYPE_DIR};
+  item.dirVal = strdup(defaultVal);
+  if (item.dirVal != NULL) {
+    terrno = TSDB_CODE_OUT_OF_MEMORY;
+    return -1;
+  }
+  return cfgAddItem(pConfig, &item, name, utype);
+}
+
+int32_t cfgAddFile(SConfig *pConfig, const char *name, const char *defaultVal, ECfgUnitType utype) {
+  SConfigItem item = {.dtype = CFG_DTYPE_FILE};
+  item.fileVal = strdup(defaultVal);
+  if (item.fileVal != NULL) {
+    terrno = TSDB_CODE_OUT_OF_MEMORY;
+    return -1;
+  }
+  return cfgAddItem(pConfig, &item, name, utype);
+}