diff --git a/ContentGrabbingJi-framework-api/src/main/java/net/lamgc/cgj/bot/framework/message/AbstractBotCode.java b/ContentGrabbingJi-framework-api/src/main/java/net/lamgc/cgj/bot/framework/message/AbstractBotCode.java
index c6ab104..91e4a03 100644
--- a/ContentGrabbingJi-framework-api/src/main/java/net/lamgc/cgj/bot/framework/message/AbstractBotCode.java
+++ b/ContentGrabbingJi-framework-api/src/main/java/net/lamgc/cgj/bot/framework/message/AbstractBotCode.java
@@ -133,4 +133,8 @@ public abstract class AbstractBotCode implements BotCode {
         return Collections.unmodifiableSet(functionProperties.keySet());
     }
 
+    @Override
+    public boolean hasProperty(String key) {
+        return functionProperties.containsKey(Objects.requireNonNull(key));
+    }
 }
diff --git a/ContentGrabbingJi-framework-api/src/main/java/net/lamgc/cgj/bot/framework/message/BotCode.java b/ContentGrabbingJi-framework-api/src/main/java/net/lamgc/cgj/bot/framework/message/BotCode.java
index 415afc1..36a0a3f 100644
--- a/ContentGrabbingJi-framework-api/src/main/java/net/lamgc/cgj/bot/framework/message/BotCode.java
+++ b/ContentGrabbingJi-framework-api/src/main/java/net/lamgc/cgj/bot/framework/message/BotCode.java
@@ -68,4 +68,12 @@ public interface BotCode extends Message {
      */
     Set<String> getPropertiesKeys();
 
+    /**
+     * 检查指定参数是否存在.
+     * @param key 待检查的参数名.
+     * @return 如果存在, 返回 {@code true}.
+     * @throws NullPointerException 当 key 为 {@code null} 时抛出.
+     */
+    boolean hasProperty(String key);
+
 }