diff --git a/port/linux/package/pikascript/PikaStdLib.py b/port/linux/package/pikascript/PikaStdLib.py
index 6c4b4dd91..378534e92 100644
--- a/port/linux/package/pikascript/PikaStdLib.py
+++ b/port/linux/package/pikascript/PikaStdLib.py
@@ -30,8 +30,8 @@ class List(TinyObj):
     def get(i: int) -> any:
         pass
 
-    def len() -> int:
+    def set(i: int, arg: any):
         pass
 
-    def remove(arg: any):
+    def len() -> int:
         pass
diff --git a/port/linux/package/pikascript/pikascript-lib/PikaStdLib/PikaStdLib_List.c b/port/linux/package/pikascript/pikascript-lib/PikaStdLib/PikaStdLib_List.c
index 68145a616..be82d88c4 100644
--- a/port/linux/package/pikascript/pikascript-lib/PikaStdLib/PikaStdLib_List.c
+++ b/port/linux/package/pikascript/pikascript-lib/PikaStdLib/PikaStdLib_List.c
@@ -1,16 +1,35 @@
 #include "PikaStdLib_List.h"
 
 void PikaStdLib_List_append(PikaObj* self, Arg* arg) {
-    obj_setArg(self, "", arg);
+    int top = obj_getInt(self, "top");
+    char buff[11];
+    char* topStr = fast_itoa(buff, top);
+    obj_setArg(self, topStr, arg);
+    /* top++ */
+    obj_setInt(self, "top", top + 1);
 }
+
 int PikaStdLib_List_len(PikaObj* self) {
-    return 0;
+    return obj_getInt(self, "top");
 }
+
 Arg* PikaStdLib_List_get(PikaObj* self, int i) {
-    return NULL;
+    char buff[11];
+    char* index = fast_itoa(buff, i);
+    return obj_getArg(self, index);
 }
-void PikaStdLib_List_remove(PikaObj* self, Arg* arg) {}
 void PikaStdLib_List_init(PikaObj* self) {
     /* set top index for append */
-    obj_setInt(self, "__top", 0);
-}
\ No newline at end of file
+    obj_setInt(self, "top", 0);
+}
+
+void PikaStdLib_List_set(PikaObj* self, Arg* arg, int i) {
+    char buff[11];
+    char* i_str = fast_itoa(buff, i);
+    int top = obj_getInt(self, "top");
+    if (i > top) {
+        obj_setErrorCode(self, 1);
+        obj_setSysOut(self, "[error]: index exceeded lengh of list.");
+    }
+    obj_setArg(self, i_str, arg);
+}