diff --git a/cmake/define.inc b/cmake/define.inc
index 92044b8c2dd3710c5a1808abcecd7d2358230e7a..21b517e197fbb8ee568d3017cd5e78a8750644e2 100755
--- a/cmake/define.inc
+++ b/cmake/define.inc
@@ -152,6 +152,17 @@ IF (TD_BUILD_HTTP)
   ADD_DEFINITIONS(-DHTTP_EMBEDDED)
 ENDIF ()
 
+IF (${BUILD_LUA} MATCHES "false")
+  SET(TD_BUILD_LUA FALSE)
+ENDIF ()
+
+IF (TD_BUILD_LUA)
+  MESSAGE("Enable lua")
+  ADD_DEFINITIONS(-DLUA_EMBEDDED)
+ELSE ()
+  MESSAGE("Disable lua")
+ENDIF ()
+
 IF ("${AVRO_SUPPORT}" MATCHES "true")
   SET(TD_AVRO_SUPPORT TRUE)
 ELSEIF ("${AVRO_SUPPORT}" MATCHES "false")
diff --git a/cmake/input.inc b/cmake/input.inc
index 0812711a5824ce0b328374fcdd04fc5f229ad01c..4273f576b4bfb292e946fa8086527a48389b9908 100755
--- a/cmake/input.inc
+++ b/cmake/input.inc
@@ -92,6 +92,8 @@ ENDIF ()
 
 SET(TD_BUILD_HTTP FALSE)
 
+SET(TD_BUILD_LUA TRUE)
+
 SET(TD_AVRO_SUPPORT FALSE)
 
 SET(TD_MEMORY_SANITIZER FALSE)
diff --git a/deps/CMakeLists.txt b/deps/CMakeLists.txt
index 38f36c4ed6678675cecfa9c0da1a3d065b58da86..45eaf6495d0f20c512d175c880af9bc1ed8f0ba6 100644
--- a/deps/CMakeLists.txt
+++ b/deps/CMakeLists.txt
@@ -15,7 +15,10 @@ ADD_SUBDIRECTORY(cJson)
 ADD_SUBDIRECTORY(wepoll)
 ADD_SUBDIRECTORY(MsvcLibX)
 ADD_SUBDIRECTORY(rmonotonic)
-ADD_SUBDIRECTORY(lua)
+
+IF (TD_BUILD_LUA)
+  ADD_SUBDIRECTORY(lua)
+ENDIF ()
 
 IF (TD_LINUX AND TD_MQTT)
   ADD_SUBDIRECTORY(MQTT-C)
diff --git a/documentation20/cn/02.getting-started/docs.md b/documentation20/cn/02.getting-started/docs.md
index adbba4603b94c689cab2e0aaaedf0e232ae3d1f4..64b05740863ddb24e1851dd230ef1093488c128b 100644
--- a/documentation20/cn/02.getting-started/docs.md
+++ b/documentation20/cn/02.getting-started/docs.md
@@ -190,7 +190,7 @@ taosdemo 详细使用方法请参照 [如何使用taosdemo对TDengine进行性
 
 ### TDengine 服务器支持的平台列表
 
-|                | **CentOS 6/7/8** | **Ubuntu 16/18/20** | **Other Linux** | **统信 UOS** | **银河/中标麒麟** | **凝思 V60/V80** | **华为 EulerOS** |
+|                | **CentOS 7/8** | **Ubuntu 16/18/20** | **Other Linux** | **统信 UOS** | **银河/中标麒麟** | **凝思 V60/V80** | **华为 EulerOS** |
 | -------------- | --------------------- | ------------------------ | --------------- | --------------- | ------------------------- | --------------------- | --------------------- |
 | X64            | ●                     | ●                        |                 | ○               | ●                         | ●                     | ●                     |
 | 龙芯 MIPS64     |                       |                          | ●               |                 |                           |                       |                       |
diff --git a/src/client/src/tscSQLParser.c b/src/client/src/tscSQLParser.c
index fb4070385cd985fc5c0a2322d86392b013fab46b..fca3b0b57b14a963f1c0e0be11c246f085b45952 100644
--- a/src/client/src/tscSQLParser.c
+++ b/src/client/src/tscSQLParser.c
@@ -439,7 +439,9 @@ int32_t handleUserDefinedFunc(SSqlObj* pSql, struct SSqlInfo* pInfo) {
   const char *msg1 = "invalidate function name";
   const char *msg2 = "path is too long";
   const char *msg3 = "invalid outputtype";
+  #ifdef LUA_EMBEDDED
   const char *msg4 = "invalid script";
+  #endif
   const char *msg5 = "invalid dyn lib";
   SSqlCmd *pCmd = &pSql->cmd;
 
@@ -478,9 +480,12 @@ int32_t handleUserDefinedFunc(SSqlObj* pSql, struct SSqlInfo* pInfo) {
       }
       //validate *.lua or .so
       int32_t pathLen = (int32_t)strlen(createInfo->path.z);
+#ifdef LUA_EMBEDDED
       if ((pathLen > 4) && (0 == strncmp(createInfo->path.z + pathLen - 4, ".lua", 4)) && !isValidScript(buf, len)) {
         return invalidOperationMsg(tscGetErrorMsgPayload(pCmd), msg4);
-      } else if (pathLen > 3 && (0 == strncmp(createInfo->path.z + pathLen - 3, ".so", 3))) {
+      } else
+#endif
+      if (pathLen > 3 && (0 == strncmp(createInfo->path.z + pathLen - 3, ".so", 3))) {
         void *handle = taosLoadDll(createInfo->path.z);
         taosCloseDll(handle);
         if (handle == NULL) {
diff --git a/src/client/src/tscServer.c b/src/client/src/tscServer.c
index 52a918bbe22589d85fc89cbff8249065129f1618..126aa3bc046b1e1d133a4d5f28a30a51fe537846 100644
--- a/src/client/src/tscServer.c
+++ b/src/client/src/tscServer.c
@@ -1536,7 +1536,17 @@ int tscBuildCreateTableMsg(SSqlObj *pSql, SSqlInfo *pInfo) {
       pMsg += sizeof(SCreateTableMsg);
 
       SCreatedTableInfo* p = taosArrayGet(list, i);
-      strcpy(pCreate->tableName, p->fullname);
+      //what pCreate->tableName point is a fixed char array which size is 237
+      //what p->fullname point is a char*
+      //before the time we copy p->fullname to pCreate->tableName , we need to check the length of p->fullname
+      if (strlen(p->fullname) > 237) {
+        tscError("failed to write this name, which is over 237, just save the first 237 char here");
+        strncpy(pCreate->tableName, p->fullname,237);
+        pCreate->tableName[236]='\0';//I don't know if this line is working properly
+      }else{
+        strcpy(pCreate->tableName, p->fullname);
+      }
+
       pCreate->igExists = (p->igExist)? 1 : 0;
 
       // use dbinfo from table id without modifying current db info
diff --git a/src/client/src/tscSystem.c b/src/client/src/tscSystem.c
index edb8169f761e2b5aaba1ddfd7cda8a9008298948..f6614fdb79f18b70cadc2351edc8e402e95bf41e 100644
--- a/src/client/src/tscSystem.c
+++ b/src/client/src/tscSystem.c
@@ -210,9 +210,9 @@ void taos_init_imp(void) {
     taosInitNotes();
 
     rpcInit();
-
+#ifdef LUA_EMBEDDED
     scriptEnvPoolInit();
-
+#endif
     tscDebug("starting to initialize TAOS client ...");
     tscDebug("Local End Point is:%s", tsLocalEp);
   }
@@ -276,7 +276,9 @@ void taos_cleanup(void) {
   }
 
   if (tscEmbedded == 0) {
+    #ifdef LUA_EMBEDDED
     scriptEnvPoolCleanup();
+    #endif
   }
 
   int32_t id = tscObjRef;
diff --git a/src/dnode/src/dnodeMain.c b/src/dnode/src/dnodeMain.c
index 69c6203ab355e93272113b0cdfbab3e066be8148..87128521730c9c58f3c3dd9b35ab3f919f6921ec 100644
--- a/src/dnode/src/dnodeMain.c
+++ b/src/dnode/src/dnodeMain.c
@@ -89,7 +89,9 @@ static SStep tsDnodeSteps[] = {
   {"dnode-shell",     dnodeInitShell,      dnodeCleanupShell},
   {"dnode-statustmr", dnodeInitStatusTimer,dnodeCleanupStatusTimer},
   {"dnode-telemetry", dnodeInitTelemetry,  dnodeCleanupTelemetry},
+#ifdef LUA_EMBEDDED
   {"dnode-script",    scriptEnvPoolInit,   scriptEnvPoolCleanup},
+#endif
   {"dnode-grant",     grantInit,           grantCleanUp},
 };
 
diff --git a/src/query/CMakeLists.txt b/src/query/CMakeLists.txt
index 4b57843708ac8d1c24c69e68fe406b0edbeeabd2..a815942fbedb4f3b99e3595c3960d931ddde192a 100644
--- a/src/query/CMakeLists.txt
+++ b/src/query/CMakeLists.txt
@@ -11,11 +11,19 @@ SET_SOURCE_FILES_PROPERTIES(src/sql.c PROPERTIES COMPILE_FLAGS -w)
 TARGET_LINK_LIBRARIES(query tsdb tutil lua)
 
 IF (TD_LINUX)
-  TARGET_LINK_LIBRARIES(query m rt lua)
+  IF (TD_BUILD_LUA)
+    TARGET_LINK_LIBRARIES(query m rt lua)
+  ELSE ()
+    TARGET_LINK_LIBRARIES(query m rt)
+  ENDIF ()
   ADD_SUBDIRECTORY(tests)
 ENDIF ()
 
 IF (TD_DARWIN)
-  TARGET_LINK_LIBRARIES(query m lua)
+  IF (TD_BUILD_LUA)
+    TARGET_LINK_LIBRARIES(query m lua)
+  ELSE ()
+    TARGET_LINK_LIBRARIES(query m)
+  ENDIF ()
   ADD_SUBDIRECTORY(tests)
 ENDIF ()
diff --git a/src/query/inc/qScript.h b/src/query/inc/qScript.h
index 574bb51368afeaeddef5fbd5c5bd8469fbe0cdef..2dc9b5812bbfa34dcebdde5438516d3be42a51d2 100644
--- a/src/query/inc/qScript.h
+++ b/src/query/inc/qScript.h
@@ -15,7 +15,7 @@
 
 #ifndef TDENGINE_QSCRIPT_H
 #define TDENGINE_QSCRIPT_H
-
+#ifdef LUA_EMBEDDED
 #include <lua.h>
 #include <lauxlib.h>
 #include <lualib.h>
@@ -78,5 +78,5 @@ void       destroyScriptCtx(void *pScriptCtx);
 int32_t scriptEnvPoolInit();
 void    scriptEnvPoolCleanup();
 bool    isValidScript(char *script, int32_t len);
-
+#endif //LUA_EMBEDDED
 #endif //TDENGINE_QSCRIPT_H 
diff --git a/src/query/src/qExecutor.c b/src/query/src/qExecutor.c
index 6a89a2f823ad3ff57807561d7ead4b919851b000..29dc65d8f8f78c12a9969db48e58ed9e4717fa98 100644
--- a/src/query/src/qExecutor.c
+++ b/src/query/src/qExecutor.c
@@ -8240,7 +8240,7 @@ void destroyUdfInfo(SUdfInfo* pUdfInfo) {
   taosCloseDll(pUdfInfo->handle);
   tfree(pUdfInfo);
 }
-
+#ifdef LUA_EMBEDDED
 static char* getUdfFuncName(char* funcname, char* name, int type) {
   switch (type) {
     case TSDB_UDF_FUNC_NORMAL:
@@ -8265,8 +8265,9 @@ static char* getUdfFuncName(char* funcname, char* name, int type) {
 
   return funcname;
 }
-
+#endif
 int32_t initUdfInfo(SUdfInfo* pUdfInfo) {
+#ifdef LUA_EMBEDDED
   if (pUdfInfo == NULL || pUdfInfo->handle) {
     return TSDB_CODE_SUCCESS;
   }
@@ -8350,7 +8351,7 @@ int32_t initUdfInfo(SUdfInfo* pUdfInfo) {
       return (*(udfInitFunc)pUdfInfo->funcs[TSDB_UDF_FUNC_INIT])(&pUdfInfo->init);
     }
   }
-
+#endif //LUA_EMBEDDED
   return TSDB_CODE_SUCCESS;
 }
 
diff --git a/src/query/src/qScript.c b/src/query/src/qScript.c
index c43b0b3435b2073d4711bbb8a0ec0d9e347b0d13..a8a6f6732b7eef33cad040c2aadc4b3e1848bde2 100644
--- a/src/query/src/qScript.c
+++ b/src/query/src/qScript.c
@@ -12,7 +12,7 @@
  * You should have received a copy of the GNU Affero General Public License
  * along with this program. If not, see <http://www.gnu.org/licenses/>.
  */
-
+#ifdef LUA_EMBEDDED
 #include "os.h"
 #include "qScript.h"
 #include "ttype.h"
@@ -444,3 +444,4 @@ bool isValidScript(char *script, int32_t len) {
   return ret;
 }
 
+#endif
diff --git a/src/util/src/tconfig.c b/src/util/src/tconfig.c
index 69b0d8d7bb9ad5ab37321a5460c3f083e3a71dba..4c968a8362766b564230befafb27c226c338c51b 100644
--- a/src/util/src/tconfig.c
+++ b/src/util/src/tconfig.c
@@ -334,8 +334,9 @@ bool taosReadConfigOption(const char *option, char *value, char *value2, char *v
         if (taosReadDirectoryConfig(cfg, value)) {
            taosReadDataDirCfg(value, value2, value3);
            ret = true;
+        } else {
+           ret = false;  
         }
-        ret = false;
         break;
       default:
         uError("config option:%s, input value:%s, can't be recognized", option, value);
diff --git a/tests/examples/lua/OpenResty/rest/test.lua b/tests/examples/lua/OpenResty/rest/test.lua
index 48aeef3fb4dd8c9a0dc18e8039b4b8c781760666..2dc0cf10f22b90c8bcb925700b1d7ebd00ff153a 100644
--- a/tests/examples/lua/OpenResty/rest/test.lua
+++ b/tests/examples/lua/OpenResty/rest/test.lua
@@ -63,6 +63,7 @@ else
 
 end
 
+--[[
 local flag = false
 function query_callback(res)
    if res.code ~=0 then
@@ -80,9 +81,10 @@ end
 driver.query_a(conn,"insert into m1 values ('2019-09-01 00:00:00.001', 3, 'robotspace'),('2019-09-01 00:00:00.006', 4, 'Hilink'),('2019-09-01 00:00:00.007', 6, 'Harmony')", query_callback)
 
 while not flag do
---   ngx.say("i am here once...")
+   ngx.say("i am here once...")
    ngx.sleep(0.001) -- time unit is second
 end
+--]]
 
 ngx.say("pool water_mark:"..pool:get_water_mark())
 
diff --git a/tests/examples/lua/README.md b/tests/examples/lua/README.md
index 32d6a4cace9bd0bf66238ff32af1d3ecf0285046..bdc88edbd7b5d6798a8df6530ea82d24eb22915b 100644
--- a/tests/examples/lua/README.md
+++ b/tests/examples/lua/README.md
@@ -1,7 +1,10 @@
 # TDengine driver connector for Lua
 
-It's a Lua implementation for [TDengine](https://github.com/taosdata/TDengine), an open-sourced big data platform designed and optimized for the Internet of Things (IoT), Connected Cars, Industrial IoT, and IT Infrastructure and Application Monitoring. You may need to install Lua5.3 .
-
+It's a Lua implementation for [TDengine](https://github.com/taosdata/TDengine), an open-sourced big data platform designed and optimized for the Internet of Things (IoT), Connected Cars, Industrial IoT, and IT Infrastructure and Application Monitoring. You may need to install Lua5.3 .  
+As TDengine is built with lua-enable, the built-in lua module conflicts with external lua. The following commands require TDengine built with lua-disable.  
+To disable built-in lua:  
+mkdir debug && cd debug  
+cmake .. -DBUILD_LUA=false && cmake --build .
 ## Lua Dependencies
 - Lua: 
 ```
diff --git a/tests/examples/lua/lua51/lua_connector51.c b/tests/examples/lua/lua51/lua_connector51.c
index fe2152945dc1915dca5de31458a8cbb2f007f4f2..b6e0b6d1de200b09750ffba6845ae9bf0606f4d8 100644
--- a/tests/examples/lua/lua51/lua_connector51.c
+++ b/tests/examples/lua/lua51/lua_connector51.c
@@ -102,7 +102,7 @@ static int l_query(lua_State *L){
     printf("failed, reason:%s\n", taos_errstr(result));
     lua_pushinteger(L, -1);
     lua_setfield(L, table_index, "code");    
-    lua_pushstring(L, taos_errstr(taos));
+    lua_pushstring(L, taos_errstr(result));
     lua_setfield(L, table_index, "error");    
    
     return 1;
diff --git a/tests/examples/lua/lua_connector.c b/tests/examples/lua/lua_connector.c
index 8c2ea3e9e83237fc8ed9ebce687f5131352e4d14..06568f35d656d5d9af1ae2e88eeaeba92f0ede91 100644
--- a/tests/examples/lua/lua_connector.c
+++ b/tests/examples/lua/lua_connector.c
@@ -102,7 +102,7 @@ static int l_query(lua_State *L){
     printf("failed, reason:%s\n", taos_errstr(result));
     lua_pushinteger(L, -1);
     lua_setfield(L, table_index, "code");    
-    lua_pushstring(L, taos_errstr(taos));
+    lua_pushstring(L, taos_errstr(result));
     lua_setfield(L, table_index, "error");    
    
     return 1;