diff --git a/infra/common/src/main/java/cn/hippo4j/common/extension/design/AbstractSubjectCenter.java b/infra/common/src/main/java/cn/hippo4j/common/extension/design/AbstractSubjectCenter.java
index 152d03ca..be8d4242 100644
--- a/infra/common/src/main/java/cn/hippo4j/common/extension/design/AbstractSubjectCenter.java
+++ b/infra/common/src/main/java/cn/hippo4j/common/extension/design/AbstractSubjectCenter.java
@@ -24,7 +24,6 @@ import lombok.extern.slf4j.Slf4j;
 import java.util.ArrayList;
 import java.util.List;
 import java.util.Map;
-import java.util.Optional;
 import java.util.concurrent.ConcurrentHashMap;
 
 /**
@@ -74,12 +73,12 @@ public class AbstractSubjectCenter {
     }
 
     /**
-     * remove observe
-     * @param subjectType subject type code
-     * @param observer observer listener
+     * Remove observer.
+     *
+     * @param observer
      */
-    public static void remove(SubjectType subjectType, Observer observer) {
-        remove(subjectType.name(), observer);
+    public static void remove(Observer observer) {
+        remove(SubjectType.SPRING_CONTENT_REFRESHED.name(), observer);
     }
 
     /**
@@ -128,19 +127,6 @@ public class AbstractSubjectCenter {
         });
     }
 
-    /**
-     * subject observer size
-     * @param subjectType subject type code
-     * @return list observer size
-     */
-    public static int size(SubjectType subjectType) {
-        List<Observer> observers = OBSERVERS_MAP.get(subjectType.name());
-        if (CollectionUtil.isEmpty(observers)) {
-            return 0;
-        }
-        return observers.size();
-    }
-
     /**
      * Subject type.
      */
diff --git a/infra/common/src/test/java/cn/hippo4j/common/extension/design/AbstractSubjectCenterTest.java b/infra/common/src/test/java/cn/hippo4j/common/extension/design/AbstractSubjectCenterTest.java
index a45fc9d5..44c31294 100644
--- a/infra/common/src/test/java/cn/hippo4j/common/extension/design/AbstractSubjectCenterTest.java
+++ b/infra/common/src/test/java/cn/hippo4j/common/extension/design/AbstractSubjectCenterTest.java
@@ -2,33 +2,132 @@ package cn.hippo4j.common.extension.design;
 
 import lombok.Getter;
 import org.junit.Assert;
+import org.junit.Before;
 import org.junit.Test;
 
+import java.lang.reflect.Field;
+import java.util.List;
+import java.util.Map;
+import java.util.concurrent.ConcurrentHashMap;
 import java.util.concurrent.atomic.AtomicInteger;
 
 public class AbstractSubjectCenterTest {
 
+
+    private Map<String, List<Observer>> OBSERVERS_MAP ;
+
+    private SubjectNotifyListener subjectNotifyListener;
+
+    @Before
+    public void setUp() throws NoSuchFieldException, IllegalAccessException {
+        subjectNotifyListener = new SubjectNotifyListener();
+
+        Field field = AbstractSubjectCenter.class.getDeclaredField("OBSERVERS_MAP");
+        field.setAccessible(true);
+        OBSERVERS_MAP = (Map<String, List<Observer>>) field.get(AbstractSubjectCenter.class);
+    }
+
+    /**
+     * test register listener
+     */
+    @Test
+    public void testDefaultRegister() {
+        AbstractSubjectCenter.register(subjectNotifyListener);
+        List<Observer> list = OBSERVERS_MAP.get(AbstractSubjectCenter.SubjectType.SPRING_CONTENT_REFRESHED.name());
+        Assert.assertNotNull(list);
+        Assert.assertEquals(1, list.size());
+        Assert.assertSame(subjectNotifyListener, list.get(0));
+        OBSERVERS_MAP.clear();
+    }
+
     /**
-     *  test Subject center
+     * test register listener
      */
     @Test
-    public void testSubjectCenter() {
-        AbstractSubjectCenter.SubjectType subjectType = AbstractSubjectCenter.SubjectType.THREAD_POOL_DYNAMIC_REFRESH;
-        SubjectNotifyListener subjectNotifyListener = new SubjectNotifyListener();
+    public void testSubjectTypeEnumRegister() {
+        AbstractSubjectCenter.register(AbstractSubjectCenter.SubjectType.THREAD_POOL_DYNAMIC_REFRESH, subjectNotifyListener);
+        List<Observer> list = OBSERVERS_MAP.get(AbstractSubjectCenter.SubjectType.THREAD_POOL_DYNAMIC_REFRESH.name());
+        Assert.assertNotNull(list);
+        Assert.assertEquals(1, list.size());
+        Assert.assertSame(subjectNotifyListener, list.get(0));
+        OBSERVERS_MAP.clear();
+    }
+
+    /**
+     * test register listener
+     */
+    @Test
+    public void testSubjectTypeNameRegister() {
+        AbstractSubjectCenter.register(AbstractSubjectCenter.SubjectType.THREAD_POOL_DYNAMIC_REFRESH.name(), subjectNotifyListener);
+        List<Observer> list = OBSERVERS_MAP.get(AbstractSubjectCenter.SubjectType.THREAD_POOL_DYNAMIC_REFRESH.name());
+        Assert.assertNotNull(list);
+        Assert.assertEquals(1, list.size());
+        Assert.assertSame(subjectNotifyListener, list.get(0));
+        OBSERVERS_MAP.clear();
+    }
+
+    /**
+     * test remove listener
+     */
+    @Test
+    public void testDefaultRemoveListener() {
+        AbstractSubjectCenter.register(subjectNotifyListener);
+        List<Observer> list = OBSERVERS_MAP.get(AbstractSubjectCenter.SubjectType.SPRING_CONTENT_REFRESHED.name());
+        Assert.assertNotNull(list);
+        Assert.assertEquals(1, list.size());
+        Assert.assertSame(subjectNotifyListener, list.get(0));
+
+        AbstractSubjectCenter.remove(subjectNotifyListener);
+        Assert.assertEquals(0, list.size());
+    }
+
+    /**
+     * test remove listener
+     */
+    @Test
+    public void testRemoveSubjectTypeNameListener() {
+        AbstractSubjectCenter.register(AbstractSubjectCenter.SubjectType.THREAD_POOL_DYNAMIC_REFRESH, subjectNotifyListener);
+        List<Observer> list = OBSERVERS_MAP.get(AbstractSubjectCenter.SubjectType.THREAD_POOL_DYNAMIC_REFRESH.name());
+        Assert.assertNotNull(list);
+        Assert.assertEquals(1, list.size());
+        Assert.assertSame(subjectNotifyListener, list.get(0));
+
+        AbstractSubjectCenter.remove(AbstractSubjectCenter.SubjectType.THREAD_POOL_DYNAMIC_REFRESH.name(), subjectNotifyListener);
+        Assert.assertEquals(0, list.size());
+    }
+
+    /**
+     * test notify
+     */
+    @Test
+    public void testNotifyBySubjectType() {
+        AbstractSubjectCenter.register(subjectNotifyListener);
+        List<Observer> list = OBSERVERS_MAP.get(AbstractSubjectCenter.SubjectType.SPRING_CONTENT_REFRESHED.name());
+        Assert.assertNotNull(list);
+
         NotifyMessage notifyMessage = new NotifyMessage();
         Assert.assertEquals(0, notifyMessage.getCount().get());
+        AbstractSubjectCenter.notify(AbstractSubjectCenter.SubjectType.SPRING_CONTENT_REFRESHED, () -> notifyMessage);
+        Assert.assertEquals(1, notifyMessage.getCount().get());
+        OBSERVERS_MAP.clear();
+    }
 
-        AbstractSubjectCenter.register(subjectType, subjectNotifyListener);
-        Assert.assertEquals(1, AbstractSubjectCenter.size(subjectType));
+    /**
+     * test notify
+     */
+    @Test
+    public void testNotifyBySubjectTypeName() {
+        AbstractSubjectCenter.register(subjectNotifyListener);
+        List<Observer> list = OBSERVERS_MAP.get(AbstractSubjectCenter.SubjectType.SPRING_CONTENT_REFRESHED.name());
+        Assert.assertNotNull(list);
 
-        AbstractSubjectCenter.notify(subjectType, () -> notifyMessage);
+        NotifyMessage notifyMessage = new NotifyMessage();
+        Assert.assertEquals(0, notifyMessage.getCount().get());
+        AbstractSubjectCenter.notify(AbstractSubjectCenter.SubjectType.SPRING_CONTENT_REFRESHED.name(), () -> notifyMessage);
         Assert.assertEquals(1, notifyMessage.getCount().get());
-
-        AbstractSubjectCenter.remove(subjectType.name(), subjectNotifyListener);
-        Assert.assertEquals(0, AbstractSubjectCenter.size(subjectType));
+        OBSERVERS_MAP.clear();
     }
 
-
     @Getter
     private static final class NotifyMessage {
         private final AtomicInteger count = new AtomicInteger(0);