diff --git a/src/main/java/com/loafle/overflow/proxy/db/DBProxy.java b/src/main/java/com/loafle/overflow/proxy/db/DBProxy.java
index 6de5d29..0214881 100644
--- a/src/main/java/com/loafle/overflow/proxy/db/DBProxy.java
+++ b/src/main/java/com/loafle/overflow/proxy/db/DBProxy.java
@@ -136,7 +136,12 @@ public class DBProxy {
 
 
             if(params.size() > 0) {
-                method = dao.getClass().getMethod(methodName, Object.class);
+//                method = dao.getClass().getMethod(methodName, Object.class);
+                method = MethodSeeker.getMethod(dao.getClass(), methodName);
+                if (method == null) {
+                    throw  new Exception("Not found method : " + methodName);
+                }
+
                 //method = dao.getClass().getMethod(methodName, paramTypes.toArray(new Class[paramTypes.size()]));
                 retObj = method.invoke(dao, valueList.toArray(new Object[valueList.size()]));
             }else {
@@ -164,6 +169,8 @@ public class DBProxy {
         }
     }
 
+
+
     public void blockUntilShutdown() throws InterruptedException {
         if (server != null) {
             server.awaitTermination();
diff --git a/src/main/java/com/loafle/overflow/proxy/db/MethodSeeker.java b/src/main/java/com/loafle/overflow/proxy/db/MethodSeeker.java
new file mode 100644
index 0000000..0552514
--- /dev/null
+++ b/src/main/java/com/loafle/overflow/proxy/db/MethodSeeker.java
@@ -0,0 +1,52 @@
+package com.loafle.overflow.proxy.db;
+
+import java.lang.reflect.Method;
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * Created by root on 17. 6. 23.
+ */
+public class MethodSeeker {
+
+    private static List<Class<?>> typeList = null;
+
+    static {
+        MethodSeeker.typeList = new ArrayList<>();
+
+        //normal
+        MethodSeeker.typeList.add(Object.class);
+        //findOne
+        MethodSeeker.typeList.add(java.io.Serializable.class);
+    }
+
+
+    public static Method getMethod(Class cls, String methodName) {
+
+        Method method = null;
+
+        for(Class<?> type : MethodSeeker.typeList) {
+            method = MethodSeeker.getMethodType(cls,methodName, type);
+            if(method != null) {
+                return method;
+            }
+        }
+
+        return method;
+
+    }
+
+    private static Method getMethodType(Class jpa, String methodName, Class<?> type) {
+        if (jpa == null) {
+            return null;
+        }
+        Method m = null;
+        try {
+            m = jpa.getMethod(methodName, type);
+        } catch (NoSuchMethodException e) {
+            return MethodSeeker.getMethodType(jpa.getSuperclass(), methodName, type);
+        }
+
+        return m;
+    }
+}