diff --git a/src/IFoxCAD.Cad/Runtime/Env.cs b/src/IFoxCAD.Cad/Runtime/Env.cs
index 9edeedbdee491da24306c1f8834b7898d3d2fdaa..b2c6e5ef9fdb34af38d79212bdb9cc3046c85a67 100644
--- a/src/IFoxCAD.Cad/Runtime/Env.cs
+++ b/src/IFoxCAD.Cad/Runtime/Env.cs
@@ -428,7 +428,7 @@ private static string GetName<T>(this T value)
         return Enum.GetName(typeof(T), value);
     }
 
-#endregion Enum
+    #endregion Enum
 
     #region 环境变量
     /// <summary>
@@ -456,7 +456,7 @@ public static void SetVar(string varName, object value)
 
             Env.Print($"{varName} 是不存在的变量！");
         }
-        
+
     }
     /// <summary>
     /// 获取系统环境变量
@@ -486,4 +486,9 @@ public static void SetEnv(string var, string? value)
     /// </summary>
     /// <param name="message">要打印的对象</param>
     public static void Print(object message) => Editor.WriteMessage($"{message}\n");
+    /// <summary>
+    /// 判断当前是否在UCS坐标下
+    /// </summary>
+    /// <returns>Bool</returns>
+    public static bool IsUcs() => (short)GetVar("WORLDUCS") == 0;
 }