diff --git a/include/common/tglobal.h b/include/common/tglobal.h
index 5022cb7be80773460f42844af10cc17290de658b..97f84f82d7d9055f85e9b7fb0422af0f0409b466 100644
--- a/include/common/tglobal.h
+++ b/include/common/tglobal.h
@@ -130,7 +130,6 @@ void    taosCfgDynamicOptions(const char *option, const char *value);
 void    taosAddDataDir(int32_t index, char *v1, int32_t level, int32_t primary);
 
 struct SConfig *taosGetCfg();
-int32_t taosAddClientLogCfg(SConfig *pCfg);
 
 #ifdef __cplusplus
 }
diff --git a/include/util/tconfig.h b/include/util/tconfig.h
index 0e1d352f9a8b2cdc4ab9bffb728868738b8b9cac..012368d9cba4ce62cb11ca4d3bacad8724e574d5 100644
--- a/include/util/tconfig.h
+++ b/include/util/tconfig.h
@@ -32,6 +32,7 @@ typedef enum {
   CFG_STYPE_ENV_VAR,
   CFG_STYPE_APOLLO_URL,
   CFG_STYPE_ARG_LIST,
+  CFG_STYPE_TAOS_OPTIONS
 } ECfgSrcType;
 
 typedef enum {
diff --git a/source/client/src/clientEnv.c b/source/client/src/clientEnv.c
index 865c3ead27ce59c29f7815d5ba4c9694056c458b..ad736fb195bc627aab06d5274435e8a1ad71a56b 100644
--- a/source/client/src/clientEnv.c
+++ b/source/client/src/clientEnv.c
@@ -307,164 +307,50 @@ int taos_init() {
 }
 
 int taos_options_imp(TSDB_OPTION option, const char *str) {
-#if 0  
-  SGlobalCfg *cfg = NULL;
+  if (option != TSDB_OPTION_CONFIGDIR) {
+    taos_init();  // initialize global config
+  } else {
+    tstrncpy(configDir, str, PATH_MAX);
+    tscInfo("set cfg:%s to %s", configDir, str);
+    return 0;
+  }
+
+  SConfig     *pCfg = taosGetCfg();
+  SConfigItem *pItem = NULL;
 
   switch (option) {
     case TSDB_OPTION_CONFIGDIR:
-      cfg = taosGetConfigOption("configDir");
-      assert(cfg != NULL);
-
-      if (cfg->cfgStatus <= TAOS_CFG_CSTATUS_OPTION) {
-        tstrncpy(configDir, str, TSDB_FILENAME_LEN);
-        cfg->cfgStatus = TAOS_CFG_CSTATUS_OPTION;
-        tscInfo("set config file directory:%s", str);
-      } else {
-        tscWarn("config option:%s, input value:%s, is configured by %s, use %s", cfg->option, str,
-                tsCfgStatusStr[cfg->cfgStatus], (char *)cfg->ptr);
-      }
+      pItem = cfgGetItem(pCfg, "configDir");
       break;
-
     case TSDB_OPTION_SHELL_ACTIVITY_TIMER:
-      cfg = taosGetConfigOption("shellActivityTimer");
-      assert(cfg != NULL);
-
-      if (cfg->cfgStatus <= TAOS_CFG_CSTATUS_OPTION) {
-        tsShellActivityTimer = atoi(str);
-        if (tsShellActivityTimer < 1) tsShellActivityTimer = 1;
-        if (tsShellActivityTimer > 3600) tsShellActivityTimer = 3600;
-        cfg->cfgStatus = TAOS_CFG_CSTATUS_OPTION;
-        tscInfo("set shellActivityTimer:%d", tsShellActivityTimer);
-      } else {
-        tscWarn("config option:%s, input value:%s, is configured by %s, use %d", cfg->option, str,
-                tsCfgStatusStr[cfg->cfgStatus], *(int32_t *)cfg->ptr);
-      }
+      pItem = cfgGetItem(pCfg, "shellActivityTimer");
       break;
-
-    case TSDB_OPTION_LOCALE: {  // set locale
-      cfg = taosGetConfigOption("locale");
-      assert(cfg != NULL);
-
-      size_t len = strlen(str);
-      if (len == 0 || len > TD_LOCALE_LEN) {
-        tscInfo("Invalid locale:%s, use default", str);
-        return -1;
-      }
-
-      if (cfg->cfgStatus <= TAOS_CFG_CSTATUS_OPTION) {
-        char sep = '.';
-
-        if (strlen(tsLocale) == 0) {  // locale does not set yet
-          char *defaultLocale = setlocale(LC_CTYPE, "");
-
-          // The locale of the current OS does not be set correctly, so the default locale cannot be acquired.
-          // The launch of current system will abort soon.
-          if (defaultLocale == NULL) {
-            tscError("failed to get default locale, please set the correct locale in current OS");
-            return -1;
-          }
-
-          tstrncpy(tsLocale, defaultLocale, TD_LOCALE_LEN);
-        }
-
-        // set the user specified locale
-        char *locale = setlocale(LC_CTYPE, str);
-
-        if (locale != NULL) {  // failed to set the user specified locale
-          tscInfo("locale set, prev locale:%s, new locale:%s", tsLocale, locale);
-          cfg->cfgStatus = TAOS_CFG_CSTATUS_OPTION;
-        } else {  // set the user specified locale failed, use default LC_CTYPE as current locale
-          locale = setlocale(LC_CTYPE, tsLocale);
-          tscInfo("failed to set locale:%s, current locale:%s", str, tsLocale);
-        }
-
-        tstrncpy(tsLocale, locale, TD_LOCALE_LEN);
-
-        char *charset = strrchr(tsLocale, sep);
-        if (charset != NULL) {
-          charset += 1;
-
-          charset = taosCharsetReplace(charset);
-
-          if (taosValidateEncodec(charset)) {
-            if (strlen(tsCharset) == 0) {
-              tscInfo("charset set:%s", charset);
-            } else {
-              tscInfo("charset changed from %s to %s", tsCharset, charset);
-            }
-
-            tstrncpy(tsCharset, charset, TD_LOCALE_LEN);
-            cfg->cfgStatus = TAOS_CFG_CSTATUS_OPTION;
-
-          } else {
-            tscInfo("charset:%s is not valid in locale, charset remains:%s", charset, tsCharset);
-          }
-
-          taosMemoryFree(charset);
-        } else {  // it may be windows system
-          tscInfo("charset remains:%s", tsCharset);
-        }
-      } else {
-        tscWarn("config option:%s, input value:%s, is configured by %s, use %s", cfg->option, str,
-                tsCfgStatusStr[cfg->cfgStatus], (char *)cfg->ptr);
-      }
+    case TSDB_OPTION_LOCALE:
+      pItem = cfgGetItem(pCfg, "locale");
       break;
-    }
-
-    case TSDB_OPTION_CHARSET: {
-      /* set charset will override the value of charset, assigned during system locale changed */
-      cfg = taosGetConfigOption("charset");
-      assert(cfg != NULL);
-
-      size_t len = strlen(str);
-      if (len == 0 || len > TD_LOCALE_LEN) {
-        tscInfo("failed to set charset:%s", str);
-        return -1;
-      }
-
-      if (cfg->cfgStatus <= TAOS_CFG_CSTATUS_OPTION) {
-        if (taosValidateEncodec(str)) {
-          if (strlen(tsCharset) == 0) {
-            tscInfo("charset is set:%s", str);
-          } else {
-            tscInfo("charset changed from %s to %s", tsCharset, str);
-          }
-
-          tstrncpy(tsCharset, str, TD_LOCALE_LEN);
-          cfg->cfgStatus = TAOS_CFG_CSTATUS_OPTION;
-        } else {
-          tscInfo("charset:%s not valid", str);
-        }
-      } else {
-        tscWarn("config option:%s, input value:%s, is configured by %s, use %s", cfg->option, str,
-                tsCfgStatusStr[cfg->cfgStatus], (char *)cfg->ptr);
-      }
-
+    case TSDB_OPTION_CHARSET:
+      pItem = cfgGetItem(pCfg, "charset");
       break;
-    }
-
     case TSDB_OPTION_TIMEZONE:
-      cfg = taosGetConfigOption("timezone");
-      assert(cfg != NULL);
-
-      if (cfg->cfgStatus <= TAOS_CFG_CSTATUS_OPTION) {
-        tstrncpy(tsTimezoneStr, str, TD_TIMEZONE_LEN);
-        tsSetTimeZone();
-        cfg->cfgStatus = TAOS_CFG_CSTATUS_OPTION;
-        tscDebug("timezone set:%s, input:%s by taos_options", tsTimezoneStr, str);
-      } else {
-        tscWarn("config option:%s, input value:%s, is configured by %s, use %s", cfg->option, str,
-                tsCfgStatusStr[cfg->cfgStatus], (char *)cfg->ptr);
-      }
+      pItem = cfgGetItem(pCfg, "timezone");
       break;
-
     default:
-      // TODO return the correct error code to client in the format for taos_errstr()
-      tscError("Invalid option %d", option);
-      return -1;
+      break;
   }
-#endif
-  return 0;
+
+  if (pItem == NULL) {
+    tscError("Invalid option %d", option);
+    return -1;
+  }
+
+  int code = cfgSetItem(pCfg, pItem->name, str, CFG_STYPE_TAOS_OPTIONS);
+  if (code != 0) {
+    tscError("failed to set cfg:%s to %s since %s", pItem->name, str, terrstr());
+  } else {
+    tscInfo("set cfg:%s to %s", pItem->name, str);
+  }
+
+  return code;
 }
 
 /**
diff --git a/source/util/src/tconfig.c b/source/util/src/tconfig.c
index 06a6b8317dba302c3528c7cae0aac26d315aab9f..9a0af24319c07241bd6c9cbfcdaa4872b76ba59e 100644
--- a/source/util/src/tconfig.c
+++ b/source/util/src/tconfig.c
@@ -472,6 +472,8 @@ const char *cfgStypeStr(ECfgSrcType type) {
       return "apollo_url";
     case CFG_STYPE_ARG_LIST:
       return "arg_list";
+    case CFG_STYPE_TAOS_OPTIONS:
+      return "taos_options";
     default:
       return "invalid";
   }