diff --git a/src/main/webapp/WEB-INF/tld/functions.tld b/src/main/webapp/WEB-INF/tld/functions.tld
new file mode 100644
index 00000000..a858db46
--- /dev/null
+++ b/src/main/webapp/WEB-INF/tld/functions.tld
@@ -0,0 +1,25 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<taglib xmlns="http://java.sun.com/xml/ns/j2ee"
+	version="2.1">
+
+    <display-name>Custom Functions</display-name>
+	<tlib-version>1.0</tlib-version>
+	<short-name>custom-funcs</short-name>
+
+	<!-- PhoneFormatUtil 클래스의 함수 -->
+	<function>
+		<name>formatPhone</name> <!-- 호출 함수명 -->
+		<function-class>itn.com.cmm.util.StringUtil2</function-class> <!-- 참조 클레스 -->
+		<function-signature>java.lang.String formatPhone(java.lang.String)</function-signature> <!-- 참조 매소드의 파라미터 설정 -->
+	</function>
+
+	<!-- 예시) function 추가 - StringUtil 클래스의 함수 -->
+	<!-- 
+	<function>
+		<name>toUpper</name>
+		<function-class>com.example.utils.StringUtil</function-class>
+		<function-signature>java.lang.String toUpperCase(java.lang.String)</function-signature>
+	</function> 
+	-->
+
+</taglib>