diff --git a/port/linux/package/pikascript/PikaStdLib.py b/port/linux/package/pikascript/PikaStdLib.py
index 378534e92..994c6a1fa 100644
--- a/port/linux/package/pikascript/PikaStdLib.py
+++ b/port/linux/package/pikascript/PikaStdLib.py
@@ -19,6 +19,12 @@ class SysObj(BaseObj):
     def remove(argPath: str):
         pass
 
+    def int(arg: any) -> int:
+        pass
+
+    def float(arg: any) -> float:
+        pass
+
 
 class List(TinyObj):
     def init():
diff --git a/port/linux/package/pikascript/pikascript-lib/PikaStdLib/PikaStdLib_SysObj.c b/port/linux/package/pikascript/pikascript-lib/PikaStdLib/PikaStdLib_SysObj.c
index 66f61c289..77fcf0cb6 100644
--- a/port/linux/package/pikascript/pikascript-lib/PikaStdLib/PikaStdLib_SysObj.c
+++ b/port/linux/package/pikascript/pikascript-lib/PikaStdLib/PikaStdLib_SysObj.c
@@ -49,3 +49,29 @@ void PikaStdLib_SysObj_type(PikaObj* self, char* argPath) {
         return;
     }
 }
+
+float PikaStdLib_SysObj_float(PikaObj* self, Arg* arg) {
+    ArgType type = arg_getType(arg);
+    if (TYPE_INT == type) {
+        return (float)arg_getInt(arg);
+    }
+    if (TYPE_FLOAT == type) {
+        return (float)arg_getFloat(arg);
+    }
+    obj_setSysOut(self, "[error] convert to float type faild.");
+    obj_setErrorCode(self, 1);
+    return -99999.99999;
+}
+
+int PikaStdLib_SysObj_int(PikaObj* self, Arg* arg) {
+    ArgType type = arg_getType(arg);
+    if (TYPE_INT == type) {
+        return (int)arg_getInt(arg);
+    }
+    if (TYPE_FLOAT == type) {
+        return (int)arg_getFloat(arg);
+    }
+    obj_setSysOut(self, "[error] convert to int type faild.");
+    obj_setErrorCode(self, 1);
+    return -999999999;
+}
\ No newline at end of file
diff --git a/port/linux/test/pikaMain-test.cpp b/port/linux/test/pikaMain-test.cpp
index ab29f25aa..bab762d7b 100644
--- a/port/linux/test/pikaMain-test.cpp
+++ b/port/linux/test/pikaMain-test.cpp
@@ -55,6 +55,36 @@ TEST(pikaMain, list_new) {
     EXPECT_EQ(a1, 7);
     EXPECT_STREQ(a2, "eee");
 
+    /* deinit */
+    obj_deinit(globals);
+    obj_deinit(pikaMain);
+    EXPECT_EQ(pikaMemNow(), 0);
+}
+
+TEST(pikaMain, int_float_convert) {
+    /* init */
+    pikaMemInfo.heapUsedMax = 0;
+    PikaObj* pikaMain = newRootObj((char*)"pikaMain", New_PikaMain);
+    /* run */
+    Parameters* globals =
+        obj_runDirect(pikaMain, (char*)
+        "a = 1\n"
+        "a_f = float(a)\n"
+        "b = 1.3\n"
+        "b_i = int(b)\n"
+        );
+    /* collect */
+    int a = obj_getInt(globals, (char*)"a");
+    float a_f = obj_getFloat(globals, (char*)"a_f");
+    float b = obj_getFloat(globals, (char*)"b");
+    int b_i = obj_getInt(globals, (char*)"b_i");
+
+    /* assert */
+    EXPECT_EQ(a, 1);
+    EXPECT_FLOAT_EQ(a_f, 1);
+    EXPECT_FLOAT_EQ(b, 1.3);
+    EXPECT_FLOAT_EQ(b_i, 1);
+
     /* deinit */
     obj_deinit(globals);
     obj_deinit(pikaMain);