diff --git a/images/visibility-on.svg b/images/visibility-on.svg
new file mode 100644
index 00000000..35a75305
--- /dev/null
+++ b/images/visibility-on.svg
@@ -0,0 +1,3 @@
+<svg width="24" height="24" viewBox="0 0 24 24" fill="none" xmlns="http://www.w3.org/2000/svg">
+<path d="M12.0021 15.5769C13.1352 15.5769 14.0976 15.1803 14.8892 14.3871C15.6809 13.5939 16.0767 12.6308 16.0767 11.4977C16.0767 10.3646 15.6802 9.40224 14.887 8.61058C14.0938 7.81891 13.1307 7.42308 11.9976 7.42308C10.8645 7.42308 9.9021 7.81966 9.11044 8.61282C8.31877 9.40601 7.92294 10.3692 7.92294 11.5023C7.92294 12.6353 8.31952 13.5977 9.11269 14.3894C9.90587 15.181 10.869 15.5769 12.0021 15.5769ZM11.9998 14.2C11.2498 14.2 10.6123 13.9375 10.0873 13.4125C9.56234 12.8875 9.29984 12.25 9.29984 11.5C9.29984 10.75 9.56234 10.1125 10.0873 9.58748C10.6123 9.06248 11.2498 8.79998 11.9998 8.79998C12.7498 8.79998 13.3873 9.06248 13.9123 9.58748C14.4373 10.1125 14.6998 10.75 14.6998 11.5C14.6998 12.25 14.4373 12.8875 13.9123 13.4125C13.3873 13.9375 12.7498 14.2 11.9998 14.2ZM11.9998 18.5C9.89472 18.5 7.96941 17.9384 6.22391 16.8153C4.47839 15.6923 3.08513 14.2147 2.04411 12.3827C1.96078 12.2391 1.89988 12.0944 1.86141 11.9485C1.82294 11.8027 1.80371 11.653 1.80371 11.4995C1.80371 11.346 1.82294 11.1965 1.86141 11.051C1.89988 10.9054 1.96078 10.7609 2.04411 10.6173C3.08513 8.78525 4.47839 7.30769 6.22391 6.18463C7.96941 5.06154 9.89472 4.5 11.9998 4.5C14.105 4.5 16.0303 5.06154 17.7758 6.18463C19.5213 7.30769 20.9145 8.78525 21.9556 10.6173C22.0389 10.7609 22.0998 10.9056 22.1383 11.0514C22.1767 11.1973 22.196 11.347 22.196 11.5005C22.196 11.654 22.1767 11.8035 22.1383 11.949C22.0998 12.0945 22.0389 12.2391 21.9556 12.3827C20.9145 14.2147 19.5213 15.6923 17.7758 16.8153C16.0303 17.9384 14.105 18.5 11.9998 18.5ZM11.9998 17C13.8832 17 15.6123 16.5041 17.1873 15.5125C18.7623 14.5208 19.9665 13.1833 20.7998 11.5C19.9665 9.81664 18.7623 8.47914 17.1873 7.48748C15.6123 6.49581 13.8832 5.99998 11.9998 5.99998C10.1165 5.99998 8.38734 6.49581 6.81234 7.48748C5.23734 8.47914 4.03317 9.81664 3.19984 11.5C4.03317 13.1833 5.23734 14.5208 6.81234 15.5125C8.38734 16.5041 10.1165 17 11.9998 17Z" fill="#4B5563"/>
+</svg>
diff --git a/index.html b/index.html
index 34e01de8..b6374090 100644
--- a/index.html
+++ b/index.html
@@ -9,17 +9,14 @@
       content="https://panda-market-sanginjeong.netlify.app/"
     />
     <meta property="og:description" content="일상의 모든 물건을 거래해보세요" />
-    <meta
-      property="og:image"
-      content="https://panda-market-sanginjeong.netlify.app/images/logo.png"
-    />
+    <meta property="og:image" content="/images/logo.png" />
     <title>판다마켓</title>
     <link rel="shortcut icon" href="./images/favicon.ico" type="image/x-icon" />
     <link rel="stylesheet" href="./pages/homePage/index.style.css" />
     <link rel="stylesheet" href="./style.css" />
   </head>
   <body>
-    <header>
+    <header class="header">
       <nav class="container">
         <a href="./index.html"
           ><img
@@ -28,7 +25,7 @@
             style="width: 153px; height: 51px"
         /></a>
         <a href="./pages/loginAndSignupPage/loginPage/login.html"
-          ><button class="login-btn">로그인</button></a
+          ><button class="button go-login-btn">로그인</button></a
         >
       </nav>
     </header>
@@ -37,12 +34,12 @@
       <div class="container">
         <div class="landing-area">
           <div class="landing-area-left">
-            <h2 class="description">
+            <h1 class="description">
               <span>일상의 모든 물건을</span>
               <span>거래해 보세요</span>
-            </h2>
+            </h1>
             <a href="/items"
-              ><button class="items-btn">구경하러 가기</button></a
+              ><button class="button items-btn">구경하러 가기</button></a
             >
           </div>
           <div class="landing-area-right">
@@ -68,14 +65,14 @@ <h2 class="description">
         <div class="hot-item-right">
           <p class="title">Hot item</p>
           <div>
-            <h2 class="description">
+            <h1 class="description">
               <span>인기 상품을</span>
               <span>확인해 보세요</span>
-            </h2>
-            <p class="sub-description">
-              span가장 HOT한 중고거래 물품을<br />
+            </h1>
+            <h2 class="sub-description">
+              가장 HOT한 중고거래 물품을<br />
               판다 마켓에서 확인해 보세요
-            </p>
+            </h2>
           </div>
         </div>
       </section>
@@ -83,14 +80,14 @@ <h2 class="description">
       <section class="main-wrap container section-search">
         <div class="search-left">
           <p class="title">Search</p>
-          <h2 class="description">
+          <h1 class="description">
             <span>구매를 원하는</span>
             <span>상품을 검색하세요</span>
-          </h2>
-          <p class="sub-description">
+          </h1>
+          <h2 class="sub-description">
             구매하고 싶은 물품은 검색해서<br />
             쉽게 찾아보세요
-          </p>
+          </h2>
         </div>
         <div class="search-right">
           <img
@@ -112,14 +109,14 @@ <h2 class="description">
         <div class="register-right">
           <p class="title">Register</p>
           <div>
-            <h2 class="description">
+            <h1 class="description">
               <span>판매를 원하는</span>
               <span>상품을 등록하세요</span>
-            </h2>
-            <p class="sub-description">
+            </h1>
+            <h2 class="sub-description">
               어떤 물건이든 판매하고 싶은 상품을<br />
               쉽게 등록하세요
-            </p>
+            </h2>
           </div>
         </div>
       </section>
@@ -145,7 +142,7 @@ <h1 class="description">
       </div>
     </section>
 
-    <footer>
+    <footer class="footer">
       <div class="footer-area container">
         <div class="footer-left">
           <p>@codeit - 2024</p>
diff --git a/pages/homePage/index.style.css b/pages/homePage/index.style.css
index 32b3ed44..aa724691 100644
--- a/pages/homePage/index.style.css
+++ b/pages/homePage/index.style.css
@@ -1,4 +1,4 @@
-.login-btn {
+.go-login-btn {
   padding: 12px 23px;
   font-size: 16px;
   line-height: 26px;
@@ -22,7 +22,7 @@
   margin: 0 auto;
 }
 
-header {
+.header {
   display: flex;
   justify-content: center;
   padding: 9px 0;
@@ -129,7 +129,7 @@ nav {
   color: var(--blue);
 }
 
-footer {
+.footer {
   background-color: #111827;
   height: 160px;
   font-weight: 400;
@@ -166,7 +166,7 @@ footer {
 }
 
 @media screen and (max-width: 1199px) {
-  header {
+  .header {
     padding: 9px 24px;
   }
   .container {
@@ -216,7 +216,7 @@ footer {
 }
 
 @media screen and (max-width: 767px) {
-  header {
+  .header {
     padding: 9px 16px;
   }
 
@@ -233,7 +233,7 @@ footer {
     width: 100%;
   }
 
-  footer {
+  .footer {
     position: relative;
   }
 
diff --git a/pages/loginAndSignupPage/formUtils.js b/pages/loginAndSignupPage/formUtils.js
new file mode 100644
index 00000000..fcdc1a8a
--- /dev/null
+++ b/pages/loginAndSignupPage/formUtils.js
@@ -0,0 +1,33 @@
+export const isValidValue = {
+  login: {
+    loginEmail: false,
+    loginPassword: false,
+  },
+  signup: {
+    signupEmail: false,
+    signupNickname: false,
+    signupPassword: false,
+    signupCheckPassword: false,
+  },
+};
+
+export const clearErrorTag = (element) => {
+  const errorTag = element.nextElementSibling;
+  if (errorTag && errorTag.classList.contains("error-message")) {
+    element.classList.remove("error-status");
+    errorTag.remove();
+  }
+};
+
+export const createErrorTag = (element, message) => {
+  const tag = document.createElement("p");
+  tag.classList.add(`error-message`);
+  tag.textContent = message;
+  element.classList.add("error-status");
+  return element.after(tag);
+};
+
+export const isValidEmail = (email) => {
+  const emailRegex = /^[^\s@]+@[^\s@]+\.[^\s@]+$/;
+  return emailRegex.test(email);
+};
diff --git a/pages/loginAndSignupPage/loginAndSignup.style.css b/pages/loginAndSignupPage/loginAndSignup.style.css
index a5fe5821..7db6c0e2 100644
--- a/pages/loginAndSignupPage/loginAndSignup.style.css
+++ b/pages/loginAndSignupPage/loginAndSignup.style.css
@@ -44,8 +44,11 @@
   padding-left: 20px;
 }
 
-.password-input-area {
+.form-input-area {
   position: relative;
+  display: flex;
+  flex-direction: column;
+  gap: 8px;
 }
 
 .visibility-img {
@@ -55,7 +58,7 @@
   background: none;
 }
 
-.form-submit-btn {
+.form-btn {
   padding: 16px 124px;
   border-radius: 40px;
   height: 56px;
@@ -124,7 +127,7 @@
   line-height: 100%;
 }
 
-.disabled {
+.form-btn:disabled {
   background-color: var(--gray400);
 }
 
diff --git a/pages/loginAndSignupPage/loginPage/login.html b/pages/loginAndSignupPage/loginPage/login.html
index 72d9b33c..2f7cbb3f 100644
--- a/pages/loginAndSignupPage/loginPage/login.html
+++ b/pages/loginAndSignupPage/loginPage/login.html
@@ -19,26 +19,37 @@
             <img class="form-logo" src="../../../images/logo.png" alt="logo" />
           </a>
         </div>
-        <form class="login-signup-form">
+        <form class="login-signup-form" id="login-form">
           <label class="form-label">이메일</label>
-          <input
-            class="form-input"
-            type="email"
-            placeholder="이메일을 입력해주세요"
-          />
+          <div class="form-input-area">
+            <input
+              id="login-email"
+              class="form-input"
+              type="email"
+              placeholder="이메일을 입력해주세요"
+            />
+          </div>
           <label class="form-label">비밀번호</label>
-          <div class="password-input-area">
+          <div class="form-input-area">
             <input
+              id="login-password"
               class="form-input"
               type="password"
               style="width: 100%"
               placeholder="비밀번호를 입력해주세요"
+              minlength="8"
             />
-            <button type="button" class="visibility-img">
-              <img src="../../../images/visibility-icon.svg" alt="visibility" />
+            <button type="button" class="button visibility-img">
+              <img
+                src="../../../images/visibility-icon.svg"
+                alt="visibility"
+                id="password-visibility-img"
+              />
             </button>
           </div>
-          <button class="form-submit-btn disabled" disabled>로그인</button>
+          <button type="submit" class="button form-btn" id="login-btn" disabled>
+            로그인
+          </button>
         </form>
 
         <div class="easy-login-area">
@@ -63,5 +74,7 @@ <h3 class="easy-login-title">간편 로그인하기</h3>
         </div>
       </div>
     </main>
+
+    <script type="module" src="./login.js"></script>
   </body>
 </html>
diff --git a/pages/loginAndSignupPage/loginPage/login.js b/pages/loginAndSignupPage/loginPage/login.js
new file mode 100644
index 00000000..aa064f3b
--- /dev/null
+++ b/pages/loginAndSignupPage/loginPage/login.js
@@ -0,0 +1,82 @@
+import {
+  clearErrorTag,
+  createErrorTag,
+  isValidEmail,
+  isValidValue,
+} from "../formUtils.js";
+
+const $loginForm = document.querySelector("#login-form");
+const $loginEmail = document.querySelector("#login-email");
+const $loginPassword = document.querySelector("#login-password");
+const $loginBtn = document.querySelector("#login-btn");
+const $visibilityBtn = document.querySelector(".visibility-img");
+
+$loginEmail.addEventListener("focusout", (e) => {
+  e.preventDefault();
+  clearErrorTag(e.target);
+  const { value } = e.target;
+  if (!value) {
+    const errorTag = createErrorTag(e.target, "이메일을 입력해주세요");
+    $loginBtn.disabled = true;
+    return errorTag;
+  }
+
+  if (!isValidEmail(value)) {
+    const errorTag = createErrorTag(e.target, "잘못된 이메일 형식입니다");
+    $loginBtn.disabled = true;
+    return errorTag;
+  }
+  isValidValue.login.loginEmail = true;
+  const checkAll = Object.values(isValidValue.login).every(
+    (bool) => bool === true
+  );
+  if (checkAll) {
+    $loginBtn.disabled = false;
+  }
+});
+
+$loginPassword.addEventListener("focusout", (e) => {
+  e.preventDefault();
+  clearErrorTag(e.target);
+  const { value } = e.target;
+  if (!value) {
+    const errorTag = createErrorTag(e.target, "비밀번호를 입력해주세요");
+    $loginBtn.disabled = true;
+    return errorTag;
+  }
+
+  if (value.length < 8) {
+    const errorTag = createErrorTag(
+      e.target,
+      "비밀번호를 8자 이상 입력해주세요."
+    );
+    $loginBtn.disabled = true;
+    return errorTag;
+  }
+  isValidValue.login.loginPassword = true;
+  const checkAll = Object.values(isValidValue.login).every(
+    (bool) => bool === true
+  );
+
+  if (checkAll) {
+    $loginBtn.disabled = false;
+  }
+});
+
+$loginForm.addEventListener("submit", (e) => {
+  e.preventDefault();
+  window.location.href = "/items";
+});
+
+$visibilityBtn.addEventListener("click", () => {
+  const $passwordVisibilityImg = document.querySelector(
+    "#password-visibility-img"
+  );
+  if ($loginPassword.type === "password") {
+    $loginPassword.type = "text";
+    $passwordVisibilityImg.src = "../../../images/visibility-on.svg";
+  } else {
+    $loginPassword.type = "password";
+    $passwordVisibilityImg.src = "../../../images/visibility-icon.svg";
+  }
+});
diff --git a/pages/loginAndSignupPage/signupPage/signup.html b/pages/loginAndSignupPage/signupPage/signup.html
index 1b3a0aa9..e71f26b4 100644
--- a/pages/loginAndSignupPage/signupPage/signup.html
+++ b/pages/loginAndSignupPage/signupPage/signup.html
@@ -19,44 +19,62 @@
             <img class="form-logo" src="../../../images/logo.png" alt="logo" />
           </a>
         </div>
-        <form class="login-signup-form">
+        <form class="login-signup-form" id="signup-form">
           <label class="form-label">이메일</label>
-          <input
-            class="form-input"
-            type="email"
-            placeholder="이메일을 입력해주세요"
-          />
+          <div class="form-input-area">
+            <input
+              id="signup-email"
+              class="form-input"
+              type="email"
+              placeholder="이메일을 입력해주세요"
+            />
+          </div>
           <label class="form-label">닉네임</label>
-          <input
-            class="form-input"
-            type="text"
-            placeholder="닉네임을 입력해주세요"
-          />
+          <div class="form-input-area">
+            <input
+              id="signup-nickname"
+              class="form-input"
+              type="text"
+              placeholder="닉네임을 입력해주세요"
+            />
+          </div>
           <label class="form-label">비밀번호</label>
-          <div class="password-input-area">
+          <div class="form-input-area">
             <input
+              id="signup-password"
               class="form-input"
               type="password"
               style="width: 100%"
               placeholder="비밀번호를 입력해주세요"
             />
-            <button type="button" class="visibility-img">
+            <button
+              type="button"
+              class="button visibility-img"
+              id="signup-password-visibility-btn"
+            >
               <img src="../../../images/visibility-icon.svg" alt="visibility" />
             </button>
           </div>
           <label class="form-label">비밀번호 확인</label>
-          <div class="password-input-area">
+          <div class="form-input-area">
             <input
+              id="signup-checkPassword"
               class="form-input"
               type="password"
               style="width: 100%"
               placeholder="비밀번호를 다시 한 번 입력해주세요"
             />
-            <button type="button" class="visibility-img">
+            <button
+              type="button"
+              class="button visibility-img"
+              id="signup-checkPassword-visibility-btn"
+            >
               <img src="../../../images/visibility-icon.svg" alt="visibility" />
             </button>
           </div>
-          <button class="form-submit-btn disabled" disabled>회원가입</button>
+          <button class="button form-btn" id="signup-btn" disabled>
+            회원가입
+          </button>
         </form>
 
         <div class="easy-login-area">
@@ -81,5 +99,7 @@ <h3 class="easy-login-title">간편 로그인하기</h3>
         </div>
       </div>
     </main>
+
+    <script type="module" src="./signup.js"></script>
   </body>
 </html>
diff --git a/pages/loginAndSignupPage/signupPage/signup.js b/pages/loginAndSignupPage/signupPage/signup.js
new file mode 100644
index 00000000..5cdc0495
--- /dev/null
+++ b/pages/loginAndSignupPage/signupPage/signup.js
@@ -0,0 +1,151 @@
+import {
+  createErrorTag,
+  clearErrorTag,
+  isValidEmail,
+  isValidValue,
+} from "../formUtils.js";
+const $signupEmail = document.querySelector("#signup-email");
+const $signupNickname = document.querySelector("#signup-nickname");
+const $signupPassword = document.querySelector("#signup-password");
+const $signupCheckPassword = document.querySelector("#signup-checkPassword");
+const $signupBtn = document.querySelector("#signup-btn");
+const $signupForm = document.querySelector("#signup-form");
+const $signupPasswordVisibilityBtn = document.querySelector(
+  "#signup-password-visibility-btn"
+);
+const $signupCheckPasswordVisibilityBtn = document.querySelector(
+  "#signup-checkPassword-visibility-btn"
+);
+
+$signupEmail.addEventListener("focusout", (e) => {
+  e.preventDefault();
+  clearErrorTag(e.target);
+  const { value } = e.target;
+  if (!value) {
+    const errorTag = createErrorTag(e.target, "이메일을 입력해주세요");
+    $signupBtn.disabled = true;
+    isValidValue.signup.signupEmail = false;
+    return errorTag;
+  }
+
+  if (!isValidEmail(value)) {
+    const errorTag = createErrorTag(e.target, "잘못된 이메일 형식입니다");
+    $signupBtn.disabled = true;
+    isValidValue.signup.signupEmail = false;
+    return errorTag;
+  }
+
+  isValidValue.signup.signupEmail = true;
+  const checkAll = Object.values(isValidValue.signup).every(
+    (bool) => bool === true
+  );
+  if (checkAll) {
+    $signupBtn.disabled = false;
+  }
+});
+
+$signupNickname.addEventListener("focusout", (e) => {
+  e.preventDefault();
+  clearErrorTag(e.target);
+  const { value } = e.target;
+  if (!value) {
+    const errorTag = createErrorTag(e.target, "닉네임을 입력해주세요");
+    $signupBtn.disabled = true;
+    isValidValue.signup.signupNickname = false;
+    return errorTag;
+  }
+
+  isValidValue.signup.signupNickname = true;
+  const checkAll = Object.values(isValidValue.signup).every(
+    (bool) => bool === true
+  );
+  if (checkAll) {
+    $signupBtn.disabled = false;
+  }
+});
+
+$signupPassword.addEventListener("focusout", (e) => {
+  e.preventDefault();
+  clearErrorTag(e.target);
+  const { value } = e.target;
+  if (!value) {
+    const errorTag = createErrorTag(e.target, "비밀번호를 입력해주세요");
+    isValidValue.signup.signupPassword = false;
+    $signupBtn.disabled = true;
+    return errorTag;
+  }
+
+  if (value.length < 8) {
+    const errorTag = createErrorTag(
+      e.target,
+      "비밀번호를 8자 이상 입력해주세요."
+    );
+    isValidValue.signup.signupPassword = false;
+    $signupBtn.disabled = true;
+    return errorTag;
+  }
+
+  if (
+    value !== $signupCheckPassword.value &&
+    $signupCheckPassword.value !== ""
+  ) {
+    const errorTag = createErrorTag(e.target, "비밀번호가 일치하지 않습니다");
+    isValidValue.signup.signupPassword = false;
+    $signupBtn.disabled = true;
+    return errorTag;
+  }
+  isValidValue.signup.signupPassword = true;
+  const checkAll = Object.values(isValidValue.signup).every(
+    (bool) => bool === true
+  );
+
+  if (checkAll) {
+    $signupBtn.disabled = false;
+  }
+});
+
+$signupCheckPassword.addEventListener("focusout", (e) => {
+  e.preventDefault();
+  clearErrorTag(e.target);
+  const { value } = e.target;
+  if (value !== $signupPassword.value) {
+    const errorTag = createErrorTag(e.target, "비밀번호가 일치하지 않습니다");
+    $signupBtn.disabled = true;
+    isValidValue.signup.signupCheckPassword = false;
+    return errorTag;
+  }
+
+  isValidValue.signup.signupCheckPassword = true;
+  const checkAll = Object.values(isValidValue.signup).every(
+    (bool) => bool === true
+  );
+
+  if (checkAll) {
+    $signupBtn.disabled = false;
+  }
+});
+
+$signupForm.addEventListener("submit", (e) => {
+  e.preventDefault();
+  window.location.href = "/pages/loginAndSignupPage/loginPage/login.html";
+});
+
+$signupPasswordVisibilityBtn.addEventListener("click", (e) => {
+  if ($signupPassword.type === "password") {
+    $signupPassword.type = "text";
+    e.target.src = "../../../images/visibility-on.svg";
+  } else {
+    $signupPassword.type = "password";
+    e.target.src = "../../../images/visibility-icon.svg";
+  }
+});
+
+$signupCheckPasswordVisibilityBtn.addEventListener("click", (e) => {
+  if ($signupCheckPassword.type === "password") {
+    $signupCheckPassword.type = "text";
+    e.target.src = "../../../images/visibility-on.svg";
+  } else {
+    $signupCheckPassword.type = "password";
+    e.target.src = "../../../images/visibility-icon.svg";
+  }
+});
diff --git a/style.css b/style.css
index b7d28c07..42985261 100644
--- a/style.css
+++ b/style.css
@@ -18,7 +18,7 @@ html {
   overflow-x: hidden;
 }
 
-button {
+.button {
   background-color: var(--blue);
   color: white;
   border: none;
@@ -30,3 +30,16 @@ li {
   list-style: none;
   padding: 0;
 }
+
+.error-message {
+  color: #F74747;
+  font-weight: 600;
+  font-size: 14px;
+  line-height: 24px;
+  margin: 0;
+  padding-left: 10px;
+}
+
+.error-status {
+  outline: 1px solid #F74747;
+}
\ No newline at end of file
