diff --git a/frontend/package.json b/frontend/package.json
index 56b3680..142f4f5 100644
--- a/frontend/package.json
+++ b/frontend/package.json
@@ -1,5 +1,6 @@
 {
   "name": "piroinfront",
+  "proxy": "http://localhost:8080",
   "version": "0.1.0",
   "private": true,
   "dependencies": {
@@ -16,7 +17,6 @@
     "react-scripts": "5.0.1",
     "web-vitals": "^2.1.4"
   },
-  "proxy": "http://13.209.73.127:8080",
   "scripts": {
     "start": "react-scripts start",
     "build": "react-scripts build",
diff --git a/frontend/src/pages/OnboardingPage.js b/frontend/src/pages/OnboardingPage.js
index b819e21..933057d 100644
--- a/frontend/src/pages/OnboardingPage.js
+++ b/frontend/src/pages/OnboardingPage.js
@@ -7,10 +7,15 @@ function OnboardingPage() {
   const navigate = useNavigate();
 
   useEffect(() => {
-    const timer = setTimeout(() => {
-      navigate('/login');
-    }, 2000);
-    return () => clearTimeout(timer);
+      const timer = setTimeout(() => {
+          const token = localStorage.getItem('token');
+          if (token) {
+              navigate('/pirocheck');
+          } else {
+              navigate('/login');
+          }
+      }, 2000);
+      return () => clearTimeout(timer);
   }, []);
 
   return (
diff --git a/frontend/src/pages/login/LoginPage.js b/frontend/src/pages/login/LoginPage.js
index a232d89..bac5e88 100644
--- a/frontend/src/pages/login/LoginPage.js
+++ b/frontend/src/pages/login/LoginPage.js
@@ -1,5 +1,6 @@
 import { useState } from 'react';
-import { useNavigate } from 'react-router-dom';  // 추가
+import { useNavigate } from 'react-router-dom';  
+import { authFetch } from '../../utils/Api';
 import styles from './LoginPage.module.css';
 
 function LoginPage() {
@@ -15,7 +16,7 @@ function LoginPage() {
 
   const handleLogin = async () => {
     try {
-      const response = await fetch('/api/auth/login', {
+      const response = await authFetch('/api/auth/login', {
         method: 'POST',
         headers: { 'Content-Type': 'application/json' },
         body: JSON.stringify(form),
diff --git a/frontend/src/pages/pirocheck/PIroCheckMain.js b/frontend/src/pages/pirocheck/PIroCheckMain.js
index 678c45a..8faf3a2 100644
--- a/frontend/src/pages/pirocheck/PIroCheckMain.js
+++ b/frontend/src/pages/pirocheck/PIroCheckMain.js
@@ -1,4 +1,3 @@
-import { useState, useEffect } from 'react';
 import { useNavigate } from 'react-router-dom';
 import styles from './PIroCheckMain.module.css';
 
diff --git a/frontend/src/pages/pirocheck/assignment/Assignment.js b/frontend/src/pages/pirocheck/assignment/Assignment.js
index 9f1644a..81a0f13 100644
--- a/frontend/src/pages/pirocheck/assignment/Assignment.js
+++ b/frontend/src/pages/pirocheck/assignment/Assignment.js
@@ -1,4 +1,5 @@
 import { useState, useEffect } from 'react';
+import { authFetch } from '../../../utils/Api';
 import styles from './Assignment.module.css';
 import LogoImg from '../../../assets/images/logo.png';
 import EditIcon from '../../../assets/images/icon_edit.svg';
@@ -14,26 +15,7 @@ const dayMap = {
     SATURDAY: 'SAT',
 };
 
-// 임시 데이터 (백엔드 연동 전)
-const MOCK_DATA = [
-    {
-        week: '1',
-        assignments: [
-            { assignmentId: 1, title: '코딩앵무 클론 코딩', week: '1', day: 'TUESDAY', sessionDate: 'HTML/CSS, Git 기초', submitted: 'SUBMITTED' },
-            { assignmentId: 2, title: '피로그래밍 페이지 클론 코딩', week: '1', day: 'TUESDAY', sessionDate: 'HTML/CSS, Git 기초', submitted: 'NOT_SUBMITTED' },
-            { assignmentId: 3, title: '코딩앵무 클론 코딩', week: '1', day: 'THURSDAY', sessionDate: 'JS', submitted: 'SUBMITTED' },
-            { assignmentId: 4, title: '숫자야구 게임', week: '1', day: 'THURSDAY', sessionDate: 'JS', submitted: 'LATE' },
-            { assignmentId: 5, title: '파이썬 코딩도장', week: '1', day: 'THURSDAY', sessionDate: 'JS', submitted: 'NOT_SUBMITTED' },
-            { assignmentId: 6, title: '아르사 팀플', week: '1', day: 'SATURDAY', sessionDate: 'DB 개론', submitted: 'SUBMITTED' },
-        ],
-    },
-    { week: '2', assignments: [] },
-    { week: '3', assignments: [] },
-    { week: '4', assignments: [] },
-    { week: '5', assignments: [] },
-];
-
-const IS_MOCK = true; // 백엔드 연동 시 false로 변경
+const IS_MOCK = false; 
 
 // 제출 상태 아이콘 (부원용)
 function StatusIcon({ status }) {
@@ -69,7 +51,7 @@ function AssignmentModal({ item, onClose, onSave }) {
             ? `/api/assignments/modify/${item.assignmentId}`
             : '/api/assignments/create';
         const method = isEdit ? 'PATCH' : 'POST';
-        await fetch(url, {
+        await authFetch(url, {
             method,
             headers: { 'Content-Type': 'application/json' },
             body: JSON.stringify({ title: form.title, week: form.week, day: form.day }),
@@ -164,13 +146,9 @@ function Assignment() {
     const [modalItem, setModalItem] = useState(undefined); // undefined=닫힘, null=생성, object=수정
 
     const fetchAll = async () => {
-        if (IS_MOCK) {
-            setWeeks(MOCK_DATA);
-            return;
-        }
         const results = await Promise.all(
             ['1', '2', '3', '4', '5'].map(w =>
-                fetch(`/api/assignments/me/${w}`)
+                authFetch(`/api/assignments/me/${w}`)
                     .then(r => r.json())
                     .catch(() => ({ week: w, assignments: [] }))
             )
@@ -182,17 +160,12 @@ function Assignment() {
 
     const handleDelete = async (assignmentId) => {
         if (!window.confirm('삭제하시겠습니까?')) return;
-        if (!IS_MOCK) {
-            await fetch(`/api/assignments/${assignmentId}`, { method: 'DELETE' });
-        }
+        await authFetch(`/api/assignments/${assignmentId}`, { method: 'DELETE' });
         fetchAll();
-    };
+    };  
 
     return (
         <div className={styles.container}>
-            {IS_MOCK && (
-                <div className={styles.mockBanner}>⚠️ 현재 임시 데이터로 표시 중입니다. 백엔드 연동 후 IS_MOCK을 false로 변경하세요.</div>
-            )}
             <div className={styles.title}>ASSIGNMENT CHECK</div>
 
             {weeks.map((w, i) => (
diff --git a/frontend/src/pages/pirocheck/assignment/Assignment.module.css b/frontend/src/pages/pirocheck/assignment/Assignment.module.css
index 8e38911..5ca20b9 100644
--- a/frontend/src/pages/pirocheck/assignment/Assignment.module.css
+++ b/frontend/src/pages/pirocheck/assignment/Assignment.module.css
@@ -103,7 +103,7 @@
 
 .dayLabel {
     color: var(--dark);
-    font-family: var(--font-title);
+    font-family: var(--font-main);
     font-size: 1.2rem;
     font-weight: 700;
 }
@@ -212,7 +212,7 @@
 }
 
 .modalTitle {
-    font-family: var(--font-title);
+    font-family: var(--font-main);
     font-size: 3rem;
     font-weight: 800;
     color: var(--main);
diff --git a/frontend/src/pages/pirocheck/attendance/Attendance.js b/frontend/src/pages/pirocheck/attendance/Attendance.js
index 64d25e2..fe8f350 100644
--- a/frontend/src/pages/pirocheck/attendance/Attendance.js
+++ b/frontend/src/pages/pirocheck/attendance/Attendance.js
@@ -1,4 +1,5 @@
 import { useState, useEffect } from 'react';
+import { authFetch } from '../../../utils/Api';
 import styles from './Attendance.module.css';
 import CloverGreen from '../../../assets/images/CloverGreen.svg';
 import CloverRed from '../../../assets/images/CloverRed.svg';
@@ -14,8 +15,11 @@ function cloverForSlot(status) {
     return <img src={CloverEmpty} className={styles.cloverSvg} alt="미정" />;
 }
 
-function slotIcon(status) {
-    if (status === true) return <img src={Coin1} className={styles.histSvg} alt="출석" />;
+function historyIcon(slots) {
+    const successCount = slots.filter(s => s.status === true).length;
+    if (successCount === 3) return <img src={Coin3} className={styles.histSvg} alt="3회 출석" />;
+    if (successCount === 2) return <img src={Coin2} className={styles.histSvg} alt="2회 출석" />;
+    if (successCount === 1) return <img src={Coin1} className={styles.histSvg} alt="1회 출석" />;
     return <img src={AngryIcon} className={styles.histSvg} alt="결석" />;
 }
 
@@ -27,7 +31,7 @@ function AdminView() {
     useEffect(() => {
         const fetchActiveCode = async () => {
             try {
-                const res = await fetch('/api/admin/attendance/active-code');
+                const res = await authFetch('/api/admin/attendance/active-code');
                 if (res.ok) {
                     const data = await res.json();
                     if (!data.isExpired) {
@@ -41,14 +45,14 @@ function AdminView() {
     }, []);
 
     const handleGenerate = async () => {
-        const res = await fetch('/api/admin/attendance/start', { method: 'POST' });
+        const res = await authFetch('/api/admin/attendance/start', { method: 'POST' });
         const data = await res.json();
         setCode(data.code);
         setHasCode(true);
     };
 
     const handleExpire = async () => {
-        await fetch('/api/admin/attendance/active-code/expire', { method: 'PUT' });
+        await authFetch('/api/admin/attendance/active-code/expire', { method: 'PUT' });
         setCode(null);
         setHasCode(false);
     };
@@ -72,7 +76,7 @@ function AdminView() {
                         종료
                     </button>
                 )}
-                <a className={styles.manageLink} href="/attendance/manage">출석 관리</a>
+                <a className={styles.manageLink} href="/pirocheck/students">출석 관리</a>
             </div>
         </>
     );
@@ -96,7 +100,7 @@ function MemberView() {
         ]
     }));
 
-    fetch('/api/attendance/user')
+    authFetch('/api/attendance/user')
         .then(r => r.json())
         .then(data => {
             const apiData = data.data || [];
@@ -112,7 +116,7 @@ function MemberView() {
 
     const handleSubmit = async () => {
         if (!inputCode.trim()) return;
-        const res = await fetch('/api/attendance/mark', {
+        const res = await authFetch('/api/attendance/mark', {
             method: 'POST',
             headers: { 'Content-Type': 'application/json' },
             body: JSON.stringify({ code: inputCode }),
@@ -123,7 +127,7 @@ function MemberView() {
         if (result.statusCode === 'SUCCESS') {
             setMessage('출석 성공!');
             const today = new Date().toISOString().split('T')[0];
-            fetch(`/api/attendance/user/date?date=${today}`)
+            authFetch(`/api/attendance/user/date?date=${today}`)
                 .then(r => r.json())
                 .then(d => setTodaySlots(d.data || []));
         } else if (result.statusCode === 'INVALID_CODE') {
@@ -166,10 +170,7 @@ function MemberView() {
                     <div key={i} className={styles.historyRow}>
                         <span className={styles.weekLabel}>{row.week}주차</span>
                         <div className={styles.historySlots}>
-                            {[0, 1, 2].map(j => {
-                                const slot = row.slots[j] ?? { status: false };
-                                return <div key={j}>{slotIcon(slot.status)}</div>;
-                            })}
+                            {historyIcon(row.slots)}
                         </div>
                     </div>
                 ))}
diff --git a/frontend/src/pages/pirocheck/deposit/Deposit.js b/frontend/src/pages/pirocheck/deposit/Deposit.js
index 8b7f2f9..07a1ba2 100644
--- a/frontend/src/pages/pirocheck/deposit/Deposit.js
+++ b/frontend/src/pages/pirocheck/deposit/Deposit.js
@@ -1,40 +1,23 @@
 import { useState, useEffect } from 'react';
+import { authFetch } from '../../../utils/Api';
 import styles from './Deposit.module.css';
 
-// 임시 데이터
-const MOCK_DATA = {
-    amount: 100000,
-    descentAssignment: 10000,
-    descentAttendance: 10000,
-    ascentDefence: 10000,
-};
-
-const IS_MOCK = true; // 백엔드 연동 시 false로 변경
+const IS_MOCK = false
 
 function Deposit() {
     const [deposit, setDeposit] = useState(null);
 
     useEffect(() => {
-        if (IS_MOCK) {
-            setDeposit(MOCK_DATA);
-            return;
-        }
-        fetch('/api/deposit/me')
+        authFetch('/api/deposit/me')
             .then(r => r.json())
             .then(data => setDeposit(data))
-            .catch(() => setDeposit(MOCK_DATA));
+            .catch(() => {}); 
     }, []);
 
     if (!deposit) return null;
 
     return (
         <div className={styles.container}>
-            {IS_MOCK && (
-                <div className={styles.mockBanner}>
-                    ⚠️ 현재 임시 데이터로 표시 중입니다. 백엔드 연동 후 IS_MOCK을 false로 변경하세요.
-                </div>
-            )}
-
             <div className={styles.title}>DEPOSIT CHECK</div>
 
             <div className={styles.amountBox}>
diff --git a/frontend/src/pages/pirocheck/students/StudentDetail.js b/frontend/src/pages/pirocheck/students/StudentDetail.js
index 6c31628..469c2f7 100644
--- a/frontend/src/pages/pirocheck/students/StudentDetail.js
+++ b/frontend/src/pages/pirocheck/students/StudentDetail.js
@@ -1,5 +1,6 @@
 import { useState, useEffect } from 'react';
 import { useParams, useLocation } from 'react-router-dom';
+import { authFetch } from '../../../utils/Api';
 import styles from './StudentDetail.module.css';
 import ProfileImg from '../../../assets/images/profile.svg';
 import Logo2 from '../../../assets/images/logo2.svg';
@@ -191,7 +192,7 @@ function StudentDetail() {
             // TODO: GET /api/admin/admin/student/{userId}/status/{week} (1~5주차)
 
             // 커리큘럼에서 세션 제목 가져오기
-            const curriculumRes = await fetch('/api/curriculums');
+            const curriculumRes = await authFetch('/api/curriculums');
             const curriculums = await curriculumRes.json();
 
             // weeks 데이터에 sessionTitles 추가
diff --git a/frontend/src/pages/pirocheck/students/StudentList.js b/frontend/src/pages/pirocheck/students/StudentList.js
index 98790c8..802bfb4 100644
--- a/frontend/src/pages/pirocheck/students/StudentList.js
+++ b/frontend/src/pages/pirocheck/students/StudentList.js
@@ -1,17 +1,10 @@
 import { useState, useEffect } from 'react';
 import { useNavigate } from 'react-router-dom';
+import { authFetch } from '../../../utils/Api';
 import styles from './StudentList.module.css';
 import ArrowRight from '../../../assets/images/icon_arrow_right.svg';
 
-const MOCK_STUDENTS = [
-    { userId: 1, name: '김피로' },
-    { userId: 2, name: '이피로' },
-    { userId: 3, name: '박피로' },
-    { userId: 4, name: '최피로' },
-    { userId: 5, name: '정피로' },
-];
-
-const IS_MOCK = true;
+const IS_MOCK = false;
 
 function StudentList() {
     const navigate = useNavigate();
@@ -19,20 +12,14 @@ function StudentList() {
     const [search, setSearch] = useState('');
 
     const fetchStudents = async (keyword = '') => {
-        if (IS_MOCK) {
-            if (keyword) {
-                setStudents(MOCK_STUDENTS.filter(s => s.name.includes(keyword)));
-            } else {
-                setStudents(MOCK_STUDENTS);
-            }
-            return;
-        }
-        const url = keyword
-            ? `/api/admin/studentlist/search?name=${keyword}`
-            : '/api/admin/studentlist';
-        const res = await fetch(url);
-        const data = await res.json();
-        setStudents(data);
+        try {
+            const url = keyword
+                ? `/api/admin/studentlist/search?name=${keyword}`
+                : '/api/admin/studentlist';
+            const res = await authFetch(url);
+            const data = await res.json();
+            setStudents(Array.isArray(data) ? data : data.data || []);
+        } catch (e) {} 
     };
 
     useEffect(() => { fetchStudents(); }, []);
@@ -41,11 +28,6 @@ function StudentList() {
 
     return (
         <div className={styles.container}>
-            {IS_MOCK && (
-                <div className={styles.mockBanner}>
-                    ⚠️ 현재 임시 데이터로 표시 중입니다.
-                </div>
-            )}
 
             <div className={styles.title}>PIROGRAMMER</div>
 
diff --git a/frontend/src/utils/Api.js b/frontend/src/utils/Api.js
new file mode 100644
index 0000000..91cdd7c
--- /dev/null
+++ b/frontend/src/utils/Api.js
@@ -0,0 +1,11 @@
+export function authFetch(url, options = {}) {
+    const token = localStorage.getItem('token');
+    return fetch(url, {
+        ...options,
+        headers: {
+            'Content-Type': 'application/json',
+            'Authorization': `Bearer ${token}`,
+            ...options.headers,
+        },
+    });
+}
\ No newline at end of file