diff --git a/Assets/Scripts/Common/ChatSystem/FireSiteInfo/ExternalForce/WaitingTruckItem.cs b/Assets/Scripts/Common/ChatSystem/FireSiteInfo/ExternalForce/WaitingTruckItem.cs
index b7cecdf..40b9b41 100644
--- a/Assets/Scripts/Common/ChatSystem/FireSiteInfo/ExternalForce/WaitingTruckItem.cs
+++ b/Assets/Scripts/Common/ChatSystem/FireSiteInfo/ExternalForce/WaitingTruckItem.cs
@@ -18,18 +18,23 @@ public class WaitingTruckItem : MonoBehaviour {
         string amount = "";
         if (info.MyCarMessage.WaterAmount != 0)
         {
-            //amount += "(载水量：" + info.MyCarMessage.WaterAmount.ToString() + ")";
-            amount += "(可用水量：" + 
-                (info.GetComponent<WaterSource>().TotalWater - info.GetComponent<WaterSource>().AllUserWater) + 
-                " L)";
-            
+            if (info.GetComponent<WaterSource>())
+            {
+                //amount += "(载水量：" + info.MyCarMessage.WaterAmount.ToString() + ")";
+                amount += "(可用水量：" +
+                    (info.GetComponent<WaterSource>().TotalWater - info.GetComponent<WaterSource>().AllUserWater) +
+                    " L)";
+            }
         }
         if(info.MyCarMessage.FoamAmount != 0)
         {
-            //amount += "(载泡沫量：" + info.MyCarMessage.FoamAmount.ToString() + ")";
-            amount += "(可用泡沫量：" +
-                (info.GetComponent<WaterSource>().TotalFoam - info.GetComponent<WaterSource>().AllUserFoam) +
-                " L)";
+            if (info.GetComponent<WaterSource>())
+            {
+                //amount += "(载泡沫量：" + info.MyCarMessage.FoamAmount.ToString() + ")";
+                amount += "(可用泡沫量：" +
+                    (info.GetComponent<WaterSource>().TotalFoam - info.GetComponent<WaterSource>().AllUserFoam) +
+                    " L)";
+            }
         }
         GetComponent<Text>().text = truckName + amount;
     }