diff --git a/src/hooks/useUserStore.tsx b/src/hooks/useUserStore.tsx
index 598888c..12b0e87 100644
--- a/src/hooks/useUserStore.tsx
+++ b/src/hooks/useUserStore.tsx
@@ -1,4 +1,5 @@
 import { create } from "zustand";
+import { persist, createJSONStorage } from "zustand/middleware";
 
 type User = {
   id: string;
@@ -20,36 +21,42 @@ interface UserState {
   clearUser: () => void;
 }
 
-export const useUserStore = create<UserState>((set, get) => ({
-  user: null,
-  token: null,
-  isLoggedIn: false,
-
-  setUserAndToken: (user, token) =>
-    set(() => ({
-      user,
-      token,
-      isLoggedIn: true,
-    })),
-
-  updateShopId: (shopId) => {
-    const current = get();
-    if (!current.user || !current.token) return;
-
-    const updatedUser = {
-      ...current.user,
-      shopId,
-    };
-
-    set({
-      user: updatedUser,
-    });
-  },
-
-  clearUser: () =>
-    set(() => ({
+export const useUserStore = create<UserState>()(
+  persist(
+    (set, get) => ({
       user: null,
       token: null,
       isLoggedIn: false,
-    })),
-}));
+
+      setUserAndToken: (user, token) =>
+        set({
+          user,
+          token,
+          isLoggedIn: true,
+        }),
+
+      updateShopId: (shopId) => {
+        const current = get();
+        if (!current.user || !current.token) return;
+
+        set({
+          user: {
+            ...current.user,
+            shopId,
+          },
+        });
+      },
+
+      clearUser: () =>
+        set({
+          user: null,
+          token: null,
+          isLoggedIn: false,
+        }),
+    }),
+    {
+      name: "user-storage",
+      storage: createJSONStorage(() => localStorage),
+    },
+  ),
+);
diff --git a/src/pages/SigninPage.tsx b/src/pages/SigninPage.tsx
index eb48c77..cd51983 100644
--- a/src/pages/SigninPage.tsx
+++ b/src/pages/SigninPage.tsx
@@ -1,3 +1,132 @@
+import { AxiosError } from "axios";
+import { useNavigate, Link } from "react-router-dom";
+
+import Logo from "../assets/logo/thejulge.svg?react";
+import { useAuthForm } from "../hooks/useAuthForm";
+
+import { postAuthentication } from "@/apis/services/authenticationService";
+import Button from "@/components/Button";
+import TextField from "@/components/TextField";
+import { ROUTES } from "@/constants/router";
+import { useUserStore } from "@/hooks/useUserStore";
+import { useModalStore } from "@/store/useModalStore";
+
 export default function SigninPage() {
-  return <div>SigninPage</div>;
+  const navigate = useNavigate();
+  const { setUserAndToken } = useUserStore();
+  const { openModal, closeModal } = useModalStore();
+
+  const { formData, errors, isFormValid, handleChange, resetForm } =
+    useAuthForm("signin");
+
+  const handleSubmit = async () => {
+    try {
+      const res = await postAuthentication({
+        email: formData.email,
+        password: formData.password,
+      });
+
+      const token = res.data.item.token;
+      const user = res.data.item.user.item;
+
+      setUserAndToken(user, token);
+
+      resetForm();
+
+      const route =
+        user.type === "employer" ? ROUTES.SHOP.ROOT : ROUTES.PROFILE.ROOT;
+
+      openModal({
+        type: "message",
+        message: "로그인에 성공했습니다!",
+        iconType: "none",
+        buttons: [
+          {
+            label: "확인",
+            style: "primary",
+            onClick: () => {
+              closeModal();
+            },
+          },
+        ],
+        onClose: () => {
+          navigate(route);
+        },
+      });
+    } catch (error: unknown) {
+      const axiosError = error as AxiosError<{ message: string }>;
+      const message =
+        axiosError.response?.data?.message ?? "로그인 실패! 다시 시도해주세요.";
+
+      openModal({
+        type: "message",
+        message: message,
+        iconType: "none",
+        buttons: [
+          {
+            label: "확인",
+            style: "primary",
+            onClick: () => {
+              closeModal();
+            },
+          },
+        ],
+      });
+    }
+  };
+
+  return (
+    <div className="w-full">
+      <Link to={ROUTES.NOTICE.ROOT}>
+        <Logo className="mx-auto mb-2 h-[2.8125rem] w-[15.5rem]" />
+      </Link>
+
+      <form
+        className="mt-[2.5rem] mx-auto flex max-w-sm flex-col gap-[1.75rem]"
+        onSubmit={(e) => {
+          e.preventDefault();
+          handleSubmit();
+        }}
+      >
+        <TextField.Input
+          id="email"
+          label="이메일"
+          type="email"
+          placeholder="입력"
+          value={formData.email}
+          onChange={handleChange("email")}
+          fullWidth
+          validateMessage={errors.email}
+        />
+
+        <TextField.Input
+          id="password"
+          label="비밀번호"
+          type="password"
+          placeholder="입력"
+          value={formData.password}
+          onChange={handleChange("password")}
+          fullWidth
+          validateMessage={errors.password}
+        />
+
+        <Button
+          type="button"
+          fullWidth
+          className="py-[0.875rem]"
+          onClick={handleSubmit}
+          disabled={!isFormValid}
+        >
+          로그인하기
+        </Button>
+      </form>
+
+      <p className="mt-[1rem] text-center text-sm">
+        회원이 아니신가요?{" "}
+        <Link to={ROUTES.AUTH.SIGNUP} className="text-[#5534DA] underline">
+          회원가입하기
+        </Link>
+      </p>
+    </div>
+  );
 }
diff --git a/src/pages/SignupPage.tsx b/src/pages/SignupPage.tsx
index f8d108e..b2af053 100644
--- a/src/pages/SignupPage.tsx
+++ b/src/pages/SignupPage.tsx
@@ -12,10 +12,12 @@ import Button from "@/components/Button";
 import TextField from "@/components/TextField";
 import { ROUTES } from "@/constants/router";
 import { useUserStore } from "@/hooks/useUserStore";
+import { useModalStore } from "@/store/useModalStore";
 
 export default function SignupPage() {
   const navigate = useNavigate();
   const { setUserAndToken } = useUserStore();
+  const { openModal, closeModal } = useModalStore();
 
   const {
     formData,
@@ -25,9 +27,6 @@ export default function SignupPage() {
     setFormData,
     resetForm,
   } = useAuthForm("signup");
-  //Alert 사용시
-  // const [alertMessage, setAlertMessage] = useState("");
-  // const [nextRoute, setNextRoute] = useState<string | null>(null);
 
   const handleSubmit = async () => {
     try {
@@ -50,33 +49,58 @@ export default function SignupPage() {
 
         resetForm();
 
-        navigate(
-          user.type === "employer" ? ROUTES.SHOP.ROOT : ROUTES.PROFILE.ROOT,
-        );
-        //Alert 사용
-        // setAlertMessage("가입이 완료되었습니다!");
-        // setNextRoute(user.type === "employer" ? ROUTES.SHOP.ROOT : ROUTES.PROFILE.ROOT);
+        const route =
+          user.type === "employer" ? ROUTES.SHOP.ROOT : ROUTES.PROFILE.ROOT;
+
+        openModal({
+          type: "message",
+          message: "가입이 완료되었습니다!",
+          iconType: "none",
+          buttons: [
+            {
+              label: "확인",
+              style: "primary",
+              onClick: () => {
+                closeModal();
+              },
+            },
+          ],
+          onClose: () => {
+            navigate(route);
+          },
+        });
       }
     } catch (error: unknown) {
       const axiosError = error as AxiosError<{ message: string }>;
       const message =
-        axiosError.response?.data?.message ?? "알 수 없는 에러 발생";
-
-      console.log(message);
-      //Alert 사용시
-      // setAlertMessage(message ?? "회원가입 실패! 다시 시도해주세요.");
-      // setNextRoute(null);
+        axiosError.response?.data?.message ??
+        "회원가입 실패! 다시 시도해주세요.";
+
+      openModal({
+        type: "message",
+        message,
+        iconType: "none",
+        buttons: [
+          {
+            label: "확인",
+            style: "primary",
+            onClick: () => {
+              closeModal();
+            },
+          },
+        ],
+      });
     }
   };
 
   return (
     <div className="w-full">
       <Link to={ROUTES.NOTICE.ROOT}>
-        <Logo className="mx-auto mb-2 h-[45px] w-[248px]" />
+        <Logo className="mx-auto mb-2 h-[2.8125rem] w-[15.5rem]" />
       </Link>
 
       <form
-        className="mt-[40px] mx-auto flex max-w-sm flex-col gap-[28px]"
+        className="mt-[2.5rem] mx-auto flex max-w-sm flex-col gap-[1.75rem]"
         onSubmit={(e) => {
           e.preventDefault();
           handleSubmit();
@@ -128,7 +152,7 @@ export default function SignupPage() {
                 setFormData((prev) => ({ ...prev, userType: "employee" }))
               }
               className={clsx(
-                "flex items-center justify-center gap-[9px] rounded-[30px] border px-[41px] py-[13px]",
+                "flex items-center justify-center gap-[0.5625rem] rounded-[1.875rem] border px-[2.5625rem] py-[0.8125rem]",
                 formData.userType === "employee"
                   ? "border-primary"
                   : "border-gray-30",
@@ -155,7 +179,7 @@ export default function SignupPage() {
                 setFormData((prev) => ({ ...prev, userType: "employer" }))
               }
               className={clsx(
-                "flex items-center justify-center gap-[9px] rounded-[30px] border px-[41px] py-[13px]",
+                "flex items-center justify-center gap-[0.5625rem] rounded-[1.875rem] border px-[2.5625rem] py-[0.8125rem]",
                 formData.userType === "employer"
                   ? "border-primary"
                   : "border-gray-30",
@@ -179,7 +203,7 @@ export default function SignupPage() {
         <Button
           type="button"
           fullWidth
-          className="py-[14px]"
+          className="py-[0.875rem]"
           onClick={handleSubmit}
           disabled={!isFormValid}
         >
@@ -187,26 +211,12 @@ export default function SignupPage() {
         </Button>
       </form>
 
-      <p className="mt-[16px] text-center text-sm">
+      <p className="mt-[1rem] text-center text-sm">
         이미 가입하셨나요?{" "}
         <Link to={ROUTES.AUTH.SIGNIN} className="text-[#5534DA] underline">
           로그인하기
         </Link>
       </p>
-
-      {/* 임시 Alert */}
-      {/* {alertMessage && (
-        <AlertModal
-          message={alertMessage}
-          onClose={() => {
-            setAlertMessage("");
-            if (nextRoute) {
-              navigate(nextRoute);
-              setNextRoute(null);
-            }
-          }}
-        />
-      )} */}
     </div>
   );
 }