diff --git a/simple.html b/simple.html
index 2887e44..c783ca7 100644
--- a/simple.html
+++ b/simple.html
@@ -1,24 +1,45 @@
 <!DOCTYPE html>
 <html lang="en">
-  <head>
-    <meta charset="UTF-8" />
-    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
-    <title>Simple TODO List</title>
-  </head>
-  <body>
-    <section id="container">
-      <h1 class="title">TODO</h1>
-      <div class="input-container">
-        <input type="text" class="todo-input" />
-        <input type="button" value="저장" />
-      </div>
-      <div class="list-container">
-        <ul id="todo-list" class="todo-list">
-          <li>밥 먹기</li>
-          <li>2시 약속</li>
-        </ul>
-      </div>
-    </section>
-    <script></script>
-  </body>
+<head>
+  <meta charset="UTF-8" />
+  <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+  <title>Simple TODO List</title>
+</head>
+<body>
+  <section id="container">
+    <h1 class="title">TODO</h1>
+    <div class="input-container">
+      <input type="text" id="todo-input" class="todo-input" />
+      <input type="button" id="save-button" value="저장" />
+    </div>
+    <div class="list-container">
+      <ul id="todo-list" class="todo-list">
+        <li>밥 먹기</li>
+        <li>2시 약속</li>
+      </ul>
+    </div>
+  </section>
+  <script>
+    const inputField = document.getElementById("todo-input");
+    const saveButton = document.getElementById("save-button");
+    const todoList = document.getElementById("todo-list");
+
+    saveButton.addEventListener("click", () => {
+      const newTodo = inputField.value.trim();
+      if (newTodo === "") {
+        alert("내용을 입력해주세요!");
+        return;
+      }
+
+      const userConfirmed = confirm(`"${newTodo}" 저장하시겠습니까?`);
+      if (userConfirmed) {
+        const newTodoListItem = document.createElement("li");
+        newTodoListItem.textContent = newTodo;
+        todoList.appendChild(newTodoListItem);
+
+        inputField.value = "";
+      }
+    });
+  </script>
+</body>
 </html>
