diff --git a/iOS/Pod/Classes/DoricContextManager.m b/iOS/Pod/Classes/DoricContextManager.m
index 5e0e4de9..a6ddc2cf 100644
--- a/iOS/Pod/Classes/DoricContextManager.m
+++ b/iOS/Pod/Classes/DoricContextManager.m
@@ -51,7 +51,7 @@ + (instancetype)instance {
 }
 
 - (void)createContext:(DoricContext *)context script:(NSString *)script source:(NSString *)source {
-    context.contextId = [NSString stringWithFormat:@"%ld", (long) self.counter++];
+    context.contextId = [NSString stringWithFormat:@"%ld", (long) ++self.counter];
     [context.driver createContext:context.contextId script:script source:source];
     dispatch_sync(self.mapQueue, ^() {
         NSValue *value = [NSValue valueWithNonretainedObject:context];
diff --git a/iOS/Pod/Classes/Engine/DoricJSRemoteExecutor.m b/iOS/Pod/Classes/Engine/DoricJSRemoteExecutor.m
index f949e98d..4875126f 100644
--- a/iOS/Pod/Classes/Engine/DoricJSRemoteExecutor.m
+++ b/iOS/Pod/Classes/Engine/DoricJSRemoteExecutor.m
@@ -22,6 +22,8 @@
 #import "DoricJSRemoteExecutor.h"
 #import <SocketRocket/SRWebSocket.h>
 #import "DoricUtil.h"
+#import "DoricJSRemoteArgType.h"
+#import "NSString+JsonString.h"
 
 static NSString * const kUrlStr = @"ws://192.168.24.240:2080";
 
@@ -121,19 +123,18 @@ - (NSString *)loadJSScript:(NSString *)script source:(NSString *)source {
 - (void)injectGlobalJSObject:(NSString *)name obj:(id)obj {
     if ([obj isKindOfClass:NSClassFromString(@"NSBlock")]) {
         self.blockMDic[name] = obj;
-    } else {
-        NSDictionary *jsonDic = @{
-                @"cmd": @"injectGlobalJSFunction",
-                @"name": name
-        };
-        NSError *err;
-        NSData *jsonData = [NSJSONSerialization dataWithJSONObject:jsonDic options:0 error:&err];
-        if (err) {
-            DoricLog(@"debugger ", NSStringFromSelector(_cmd), @" failed");
-            return;
-        }
-        [self.srWebSocket send:jsonData];
     }
+    NSDictionary *jsonDic = @{
+        @"cmd": @"injectGlobalJSFunction",
+        @"name": name
+    };
+
+    NSString *jsonStr = [NSString dc_convertToJsonWithDic:jsonDic];
+    if (!jsonStr) {
+        return;
+    }
+   
+    [self.srWebSocket send:jsonStr];
 }
 
 - (JSValue *)invokeObject:(NSString *)objName method:(NSString *)funcName args:(NSArray *)args {
@@ -141,27 +142,27 @@ - (JSValue *)invokeObject:(NSString *)objName method:(NSString *)funcName args:(
     NSMutableArray *argsMArr = [NSMutableArray new];
     for (id arg in args) {
         NSDictionary *dic = @{
-            @"type": [arg class],
+            @"type": @(DoricargTypeWithArg(arg)),
             @"value": arg
         };
         [argsMArr addObject:dic];
     }
     
+    NSArray *argsArr = [argsMArr copy];
+    
     NSDictionary *jsonDic = @{
         @"cmd": @"invokeMethod",
-        @"obj": objName,
+        @"objectName": objName,
         @"functionName": funcName,
-        @"javaValues": argsMArr
+        @"javaValues": argsArr
     };
     
-    NSError * err;
-    NSData * jsonData = [NSJSONSerialization dataWithJSONObject:jsonDic options:0 error:&err];
-    if (err) {
-        DoricLog(@"debugger ", NSStringFromSelector(_cmd), @" failed");
+    NSString *jsonStr = [NSString dc_convertToJsonWithDic:jsonDic];
+    if (!jsonStr) {
         return nil;
     }
     
-    [self.srWebSocket send:jsonData];
+    [self.srWebSocket send:jsonStr];
     DC_LOCK(self.semaphore);
     
     return self.temp;
diff --git a/iOS/Pod/Classes/Util/Category/NSString+JsonString.h b/iOS/Pod/Classes/Util/Category/NSString+JsonString.h
new file mode 100644
index 00000000..9581e9a3
--- /dev/null
+++ b/iOS/Pod/Classes/Util/Category/NSString+JsonString.h
@@ -0,0 +1,18 @@
+//
+//  NSString+JsonString.h
+//  Doric
+//
+//  Created by Insomnia on 2019/11/7.
+//
+
+
+
+#import <Foundation/Foundation.h>
+
+NS_ASSUME_NONNULL_BEGIN
+
+@interface NSString (JsonString)
++ (NSString *)dc_convertToJsonWithDic:(NSDictionary *)dic;
+@end
+
+NS_ASSUME_NONNULL_END
diff --git a/iOS/Pod/Classes/Util/Category/NSString+JsonString.m b/iOS/Pod/Classes/Util/Category/NSString+JsonString.m
new file mode 100644
index 00000000..bcdd6437
--- /dev/null
+++ b/iOS/Pod/Classes/Util/Category/NSString+JsonString.m
@@ -0,0 +1,23 @@
+//
+//  NSString+JsonString.m
+//  Doric
+//
+//  Created by Insomnia on 2019/11/7.
+//
+
+#import "NSString+JsonString.h"
+#import "DoricUtil.h"
+
+@implementation NSString (JsonString)
++ (NSString *)dc_convertToJsonWithDic:(NSDictionary *)dic {
+    NSError *err;
+    NSData *jsonData = [NSJSONSerialization dataWithJSONObject:dic options:NSJSONWritingPrettyPrinted error:&err];
+    NSString *jsonStr = [[NSString alloc] initWithData:jsonData encoding:NSUTF8StringEncoding];
+    
+    if (err) {
+        DoricLog(NSStringFromSelector(_cmd), @"Convert dictionary to json string failed.");
+        return nil;
+    }
+    return jsonStr;
+}
+@end
diff --git a/iOS/Pod/Classes/Util/DoricJSRemoteArgType.h b/iOS/Pod/Classes/Util/DoricJSRemoteArgType.h
new file mode 100644
index 00000000..f18ea41d
--- /dev/null
+++ b/iOS/Pod/Classes/Util/DoricJSRemoteArgType.h
@@ -0,0 +1,23 @@
+//
+//  DoricJSRemoteArgType.h
+//  Doric
+//
+//  Created by Insomnia on 2019/11/7.
+//
+
+#import <Foundation/Foundation.h>
+
+NS_ASSUME_NONNULL_BEGIN
+
+typedef NS_ENUM(NSUInteger, DoricJSRemoteArgType) {
+    DoricJSRemoteArgTypeNil = 0,
+    DoricJSRemoteArgTypeInteger,
+    DoricJSRemoteArgTypeBool,
+    DoricJSRemoteArgTypeString,
+    DoricJSRemoteArgTypeObject,
+    DoricJSRemoteArgTypeArray,
+};
+
+DoricJSRemoteArgType DoricargTypeWithArg(id arg);
+
+NS_ASSUME_NONNULL_END
diff --git a/iOS/Pod/Classes/Util/DoricJSRemoteArgType.m b/iOS/Pod/Classes/Util/DoricJSRemoteArgType.m
new file mode 100644
index 00000000..1b018109
--- /dev/null
+++ b/iOS/Pod/Classes/Util/DoricJSRemoteArgType.m
@@ -0,0 +1,12 @@
+//
+//  DoricJSRemoteArgType.m
+//  Doric
+//
+//  Created by Insomnia on 2019/11/7.
+//
+
+#import "DoricJSRemoteArgType.h"
+DoricJSRemoteArgType DoricargTypeWithArg(id arg) {
+    // TODO: 类型缺失
+    return DoricJSRemoteArgTypeString;
+}