diff --git a/components/finsh/msh.c b/components/finsh/msh.c
index 86985c561cb11752b4325b33ee0f90356366b402..18182ca2646a094587c3cb9ad2c985550f06ce24 100644
--- a/components/finsh/msh.c
+++ b/components/finsh/msh.c
@@ -257,21 +257,6 @@ int msh_exec_module(const char *cmd_line, int size)
     rt_free(pg_name);
     return ret;
 }
-
-int system(const char *command)
-{
-    int ret = -RT_ENOMEM;
-    char *cmd = rt_strdup(command);
-
-    if (cmd)
-    {
-        ret = msh_exec(cmd, rt_strlen(cmd));
-        rt_free(cmd);
-    }
-
-    return ret;
-}
-RTM_EXPORT(system);
 #endif /* defined(RT_USING_MODULE) && defined(RT_USING_DFS) */
 
 static int _msh_exec_cmd(char *cmd, rt_size_t length, int *retp)
diff --git a/components/libc/compilers/armlibc/syscalls.c b/components/libc/compilers/armlibc/syscalls.c
index 7d8ec2e8b44e5e0501aa2daf9cf5512f5a47e0c6..3b1627d82a8220433dd828b03d013b13e9b6d3f4 100644
--- a/components/libc/compilers/armlibc/syscalls.c
+++ b/components/libc/compilers/armlibc/syscalls.c
@@ -319,16 +319,6 @@ int remove(const char *filename)
 #endif
 }
 
-#if defined(RT_USING_FINSH) && defined(RT_USING_MODULE) && defined(RT_USING_DFS)
-/* use system(const char *string) implementation in the msh */
-#else
-int system(const char *string)
-{
-    extern int __rt_libc_system(const char *string);
-    return __rt_libc_system(string);
-}
-#endif
-
 #ifdef __MICROLIB
 #include <stdio.h>
 
diff --git a/components/libc/compilers/common/stdlib.c b/components/libc/compilers/common/stdlib.c
index 16a13afb83a3916ec6605dc251c547c59f74fb7a..6cc0b9fdacd199a32e030829ec7551747810bdec 100644
--- a/components/libc/compilers/common/stdlib.c
+++ b/components/libc/compilers/common/stdlib.c
@@ -25,11 +25,21 @@ void __rt_libc_exit(int status)
     }
 }
 
-int __rt_libc_system(const char *string)
-{
 #ifdef RT_USING_MSH
+int system(const char *command)
+{
     extern int msh_exec(char *cmd, rt_size_t length);
-    msh_exec((char*)string, rt_strlen(string));
-#endif
-    return 0;
+
+    int ret = -RT_ENOMEM;
+    char *cmd = rt_strdup(command);
+
+    if (cmd)
+    {
+        ret = msh_exec(cmd, rt_strlen(cmd));
+        rt_free(cmd);
+    }
+
+    return ret;
 }
+RTM_EXPORT(system);
+#endif
diff --git a/components/libc/compilers/dlib/syscalls.c b/components/libc/compilers/dlib/syscalls.c
index e1c9562b3a81bab6a3b71d16db6974692e144ad7..1ee6a3bc12ba4b10193a2896e03af7afb96af3ca 100644
--- a/components/libc/compilers/dlib/syscalls.c
+++ b/components/libc/compilers/dlib/syscalls.c
@@ -6,7 +6,6 @@
  * Change Logs:
  * Date           Author       Notes
  * 2021-02-13     Meco Man     implement exit() and abort()
- * 2021-02-20     Meco Man     add system()
  */
 #include <rtthread.h>
 
@@ -17,9 +16,3 @@ void __exit (int status)
     __rt_libc_exit(status);
     while(1);
 }
-
-int system(const char * string)
-{
-    extern int __rt_libc_system(const char *string);
-    return __rt_libc_system(string);
-}
diff --git a/components/libc/compilers/gcc/newlib/syscalls.c b/components/libc/compilers/gcc/newlib/syscalls.c
index 8b7ff9efdb4561f66cf3fa47091c83b3ca75c0cb..f5a2c16ecc774e36d30bb5e62a87e717712ff9b0 100644
--- a/components/libc/compilers/gcc/newlib/syscalls.c
+++ b/components/libc/compilers/gcc/newlib/syscalls.c
@@ -308,12 +308,6 @@ _ssize_t _write_r(struct _reent *ptr, int fd, const void *buf, size_t nbytes)
 #endif
 }
 
-void _system(const char *s)
-{
-    extern int __rt_libc_system(const char *string);
-    __rt_libc_system(s);
-}
-
 /* for exit() and abort() */
 __attribute__ ((noreturn)) void _exit (int status)
 {