diff --git a/hwe/j_simulate_battle.php b/hwe/j_simulate_battle.php
index c48ee59b..6d2a8109 100644
--- a/hwe/j_simulate_battle.php
+++ b/hwe/j_simulate_battle.php
@@ -15,6 +15,14 @@ if($query === null){
     ]);
 }
 
+$action = Util::getReq('action');
+if($action === null || in_array($action, ['reorder', 'battle'])){
+    Json::die([
+        'result'=>false,
+        'reason'=>'원하는 동작이 지정되지 않았습니다.'
+    ]);
+}
+
 $query = Json::decode($query);
 if($query === null){
     Json::die([
diff --git a/hwe/js/battle_simulator.js b/hwe/js/battle_simulator.js
index 3a4d988d..c1a304c4 100644
--- a/hwe/js/battle_simulator.js
+++ b/hwe/js/battle_simulator.js
@@ -527,6 +527,7 @@ jQuery(function($){
             url:'j_simulate_battle.php',
             dataType:'json',
             data:{
+                action:'battle',
                 query:JSON.stringify(data),
             }
         }).then(function(result){