diff --git a/src/app/(auth)/layout.tsx b/src/app/(auth)/layout.tsx
index c8cc154..6d244fb 100644
--- a/src/app/(auth)/layout.tsx
+++ b/src/app/(auth)/layout.tsx
@@ -4,8 +4,8 @@ export default function DashboardLayout({
   children: React.ReactNode
 }) {
   return (
-    <div className="flex min-h-screen w-full items-center justify-center">
-      <div className="flex w-520 flex-col items-center justify-center gap-24 px-12 sm:px-0">
+    <div className="flex h-full items-center justify-center">
+      <div className="flex w-520 flex-col items-center justify-center gap-24 px-0 tablet:px-12">
         {children}
       </div>
     </div>
diff --git a/src/app/(auth)/login/page.tsx b/src/app/(auth)/login/page.tsx
index dbb675e..ccb79d1 100644
--- a/src/app/(auth)/login/page.tsx
+++ b/src/app/(auth)/login/page.tsx
@@ -1,16 +1,15 @@
 'use client'
+
+import { useMounted } from '@hooks/useMounted'
 import Link from 'next/link'
-import { useEffect, useState } from 'react'
 
 import AuthLogo from '@/app/features/auth/components/AuthLogo'
 import LoginForm from '@/app/features/auth/components/LoginForm'
 
 export default function Login() {
-  const [mounted, setMounted] = useState(false)
-  useEffect(() => setMounted(true), [])
-  if (!mounted) {
-    return null
-  }
+  const mounted = useMounted()
+  if (!mounted) return null
+
   return (
     <>
       <AuthLogo text="오늘도 만나서 반가워요!" />
diff --git a/src/app/(auth)/signup/page.tsx b/src/app/(auth)/signup/page.tsx
index 4cf052c..df6d848 100644
--- a/src/app/(auth)/signup/page.tsx
+++ b/src/app/(auth)/signup/page.tsx
@@ -1,10 +1,25 @@
 'use client'
 
+import { useMounted } from '@hooks/useMounted'
+import Link from 'next/link'
+
+import AuthLogo from '@/app/features/auth/components/AuthLogo'
 import SignupForm from '@/app/features/auth/components/SignupForm'
+
 export default function Signup() {
+  const mounted = useMounted()
+  if (!mounted) return null
+
   return (
     <>
+      <AuthLogo text="환영합니다!" />
       <SignupForm />
+      <p className="text-16 font-normal">
+        이미 회원이신가요?{' '}
+        <Link className="Text-violet underline" href="/login">
+          로그인
+        </Link>
+      </p>
     </>
   )
 }
diff --git a/src/app/features/auth/components/LoginForm.tsx b/src/app/features/auth/components/LoginForm.tsx
index 4c178d3..ed93927 100644
--- a/src/app/features/auth/components/LoginForm.tsx
+++ b/src/app/features/auth/components/LoginForm.tsx
@@ -26,7 +26,7 @@ export default function LoginForm() {
   return (
     <form
       className="flex w-full flex-col gap-16"
-      onSubmit={handleSubmit(async (data) => await loginMutate(data))}
+      onSubmit={handleSubmit((data) => loginMutate(data))}
     >
       <Input
         labelName="이메일"
diff --git a/src/app/features/auth/components/SignupForm.tsx b/src/app/features/auth/components/SignupForm.tsx
index a4ba728..e8bbf5a 100644
--- a/src/app/features/auth/components/SignupForm.tsx
+++ b/src/app/features/auth/components/SignupForm.tsx
@@ -6,7 +6,7 @@ import { useState } from 'react'
 import { useForm } from 'react-hook-form'
 
 import { useConfirmPasswordValidation } from '../hooks/useConfirmPasswordValidation'
-import { useSignupSubmit } from '../hooks/useSignupSubmit'
+import { useSignupMutation } from '../hooks/useSignupMutation'
 import { signupValidation } from '../schemas/signupValidation'
 import { SignupFormData } from '../types/auth.type'
 
@@ -16,7 +16,7 @@ export default function SignupForm() {
     handleSubmit,
     trigger,
     getValues,
-    formState: { errors, isSubmitting, isValid },
+    formState: { errors, isValid },
   } = useForm<SignupFormData>({
     mode: 'onChange',
     defaultValues: {
@@ -28,7 +28,7 @@ export default function SignupForm() {
   })
 
   const [isChecked, setIsChecked] = useState(false)
-  const { submit } = useSignupSubmit()
+  const { mutate: signupMtate, isPending } = useSignupMutation()
   const validation = useConfirmPasswordValidation(getValues)
 
   function handleAgree() {
@@ -36,7 +36,12 @@ export default function SignupForm() {
   }
 
   return (
-    <form className="flex flex-col gap-16" onSubmit={handleSubmit(submit)}>
+    <form
+      className="flex w-full flex-col gap-16"
+      onSubmit={handleSubmit(({ email, nickname, password }) =>
+        signupMtate({ email, nickname, password }),
+      )}
+    >
       <Input
         labelName="이메일"
         type="email"
@@ -92,13 +97,11 @@ export default function SignupForm() {
         type="submit"
         className={cn(
           'mt-8 h-50 w-full rounded-8 text-lg font-medium text-white',
-          isValid && isChecked && !isSubmitting
-            ? 'BG-blue'
-            : 'BG-blue-disabled',
+          isValid && isChecked && !isPending ? 'BG-blue' : 'BG-blue-disabled',
         )}
-        disabled={isSubmitting || !isValid || !isChecked}
+        disabled={isPending || !isValid || !isChecked}
       >
-        회원가입
+        {isPending ? '처리 중..' : '회원가입'}
       </button>
     </form>
   )
diff --git a/src/app/features/auth/hooks/useAuth.ts b/src/app/features/auth/hooks/useAuth.ts
index ecda0ec..18a0140 100644
--- a/src/app/features/auth/hooks/useAuth.ts
+++ b/src/app/features/auth/hooks/useAuth.ts
@@ -1,8 +1,6 @@
 import { User } from '@/app/shared/types/user.type'
 
-import { signup as signupApi } from '../api/authApi'
 import { useAuthStore } from '../store/useAuthStore'
-import { SignupRequest } from '../types/auth.type'
 
 export function useAuth() {
   const { setAccessToken, setUser, clearAuthState } = useAuthStore()
@@ -18,10 +16,6 @@ export function useAuth() {
     setUser(user)
   }
 
-  async function signup(data: SignupRequest) {
-    await signupApi(data)
-  }
-
   function logout() {
     clearAuthState()
     useAuthStore.persist.clearStorage()
@@ -29,7 +23,6 @@ export function useAuth() {
 
   return {
     updateAuthState,
-    signup,
     logout,
   }
 }
diff --git a/src/app/features/auth/hooks/useSignupMutation.ts b/src/app/features/auth/hooks/useSignupMutation.ts
new file mode 100644
index 0000000..039b4c5
--- /dev/null
+++ b/src/app/features/auth/hooks/useSignupMutation.ts
@@ -0,0 +1,34 @@
+import { showError, showSuccess } from '@lib/toast'
+import { useMutation } from '@tanstack/react-query'
+import type { AxiosError } from 'axios'
+import axios from 'axios'
+import { useRouter } from 'next/navigation'
+
+import { User } from '@/app/shared/types/user.type'
+
+import { signup } from '../api/authApi'
+import { SignupRequest } from '../types/auth.type'
+
+export function useSignupMutation() {
+  const router = useRouter()
+
+  return useMutation<User, AxiosError | Error, SignupRequest>({
+    mutationFn: signup,
+    onSuccess: async () => {
+      showSuccess('회원가입이 완료되었습니다!')
+      await new Promise((resolve) => setTimeout(resolve, 400))
+      router.push('/login')
+    },
+    onError: (error) => {
+      if (axios.isAxiosError(error)) {
+        const severMessage = (
+          error.response?.data as { message?: string } | undefined
+        )?.message
+        const fallback = error.message || '로그인 실패'
+        showError(severMessage ?? fallback)
+      } else {
+        showError('알 수 없는 에러 발생')
+      }
+    },
+  })
+}
diff --git a/src/app/features/auth/hooks/useSignupSubmit.ts b/src/app/features/auth/hooks/useSignupSubmit.ts
deleted file mode 100644
index 1a1a843..0000000
--- a/src/app/features/auth/hooks/useSignupSubmit.ts
+++ /dev/null
@@ -1,28 +0,0 @@
-import axios from 'axios'
-import { useRouter } from 'next/navigation'
-import { toast } from 'sonner'
-
-import { SignupRequest } from '../types/auth.type'
-import { useAuth } from './useAuth'
-
-export function useSignupSubmit() {
-  const { signup } = useAuth()
-  const router = useRouter()
-
-  async function submit(data: SignupRequest) {
-    try {
-      await signup(data)
-      toast.success('가입이 완료되었습니다!')
-      router.push('/login')
-    } catch (e: unknown) {
-      if (axios.isAxiosError(e)) {
-        const message = e.response?.data?.message
-        toast.error(message ?? '회원가입에 실패하였습니다.')
-      } else {
-        toast.error('알 수 없는 에러 발생')
-      }
-    }
-  }
-
-  return { submit }
-}
diff --git a/src/app/globals.css b/src/app/globals.css
index c024759..873af03 100644
--- a/src/app/globals.css
+++ b/src/app/globals.css
@@ -8,6 +8,11 @@
   --font-sans: 'Pretendard', 'Noto Sans KR', sans-serif;
 }
 
+html,
+body {
+  height: 100%;
+}
+
 body {
   font-family: var(--font-sans);
 }
diff --git a/src/app/shared/hooks/useMounted.ts b/src/app/shared/hooks/useMounted.ts
new file mode 100644
index 0000000..aaa640a
--- /dev/null
+++ b/src/app/shared/hooks/useMounted.ts
@@ -0,0 +1,11 @@
+import { useEffect, useState } from 'react'
+
+export function useMounted() {
+  const [mounted, setMounted] = useState(false)
+
+  useEffect(() => {
+    setMounted(true)
+  }, [])
+
+  return mounted
+}
diff --git a/src/app/shared/types/user.type.ts b/src/app/shared/types/user.type.ts
index 75d83ed..368e4e4 100644
--- a/src/app/shared/types/user.type.ts
+++ b/src/app/shared/types/user.type.ts
@@ -3,6 +3,6 @@ export interface User {
   email: string
   nickname: string
   profileImageUrl: string | null
-  createdAt?: string
-  updatedAt?: string
+  createdAt: string
+  updatedAt: string
 }