diff --git a/src/App.jsx b/src/App.jsx
index 6a89ecb..f0792b9 100644
--- a/src/App.jsx
+++ b/src/App.jsx
@@ -147,22 +147,19 @@ export default function App() {
                     />
                     <Route
                         path='/addChallenge'
-                        element={
-                            <AddChallengeScreen onNavigate={navigate} />
-                        }
+                        element={<AddChallengeScreen onNavigate={navigate} />}
                     />
                     {/* 404: 알 수 없는 경로는 홈으로 리디렉션 */}
-                    <Route 
-                        path='*' 
-                        element={<Navigate to='/' replace />} 
-                    />
-                    
+                    <Route path='*' element={<Navigate to='/' replace />} />
                 </Routes>
 
-                <BottomNavigation
-                    active={activeTab}
-                    onChange={(tab) => navigate(tab)}
-                />
+                {/* 하단 네비게이션 바 - addChallenge 페이지에서는 숨김 */}
+                {location.pathname !== '/addChallenge' && (
+                    <BottomNavigation
+                        active={activeTab}
+                        onChange={(tab) => navigate(tab)}
+                    />
+                )}
             </div>
         );
     }
diff --git a/src/components/screens/AddChallengeScreen.jsx b/src/components/screens/AddChallengeScreen.jsx
index e21be50..7adc007 100644
--- a/src/components/screens/AddChallengeScreen.jsx
+++ b/src/components/screens/AddChallengeScreen.jsx
@@ -3,160 +3,385 @@ import { useDispatch } from 'react-redux';
 import { setActiveTab } from '../../store/slices/appSlice';
 import api from '../../api/axios';
 
+// 챌린지 타입 키워드 (백엔드 자동 인증 연동용)
+const VALID_CHALLENGE_TYPES = [
+    '따릉이',
+    '전기차',
+    '수소차',
+    '재활용센터',
+    '제로웨이스트',
+];
+
 export default function AddChallengeScreen({ onNavigate }) {
-  const dispatch = useDispatch();
+    const dispatch = useDispatch();
+    const [isLoading, setIsLoading] = useState(false);
+    const [error, setError] = useState('');
+    const [descriptionError, setDescriptionError] = useState('');
 
-  const navigate = (tab) => {
-    if (typeof onNavigate === 'function') return onNavigate(tab);
-    dispatch(setActiveTab(tab));
-  };
+    const navigate = (tab) => {
+        if (typeof onNavigate === 'function') return onNavigate(tab);
+        dispatch(setActiveTab(tab));
+    };
 
+    // Description 유효성 검사 함수
+    const validateDescription = (description) => {
+        if (!description.trim()) {
+            return '설명을 입력해주세요.';
+        }
 
+        const firstWord = description.trim().split(' ')[0];
+        if (!VALID_CHALLENGE_TYPES.includes(firstWord)) {
+            return `설명은 다음 키워드 중 하나로 시작해야 합니다: ${VALID_CHALLENGE_TYPES.join(
+                ', '
+            )}`;
+        }
+
+        return '';
+    };
+
+    // Description 입력 변경 핸들러
+    const handleDescriptionChange = (e) => {
+        const value = e.target.value;
+        const validationError = validateDescription(value);
+        setDescriptionError(validationError);
+    };
 
     const handleAddChallenge = async () => {
-        console.log("추가 버튼 클릭");
-        const token = localStorage.getItem('token'); 
+        console.log('추가 버튼 클릭');
+        setError('');
 
-        const challengeName = document.getElementById('challengeName').value;
-        const description = document.getElementById('description').value;
+        const challengeName = document
+            .getElementById('challengeName')
+            .value.trim();
+        const description = document.getElementById('description').value.trim();
         const memberCount = document.getElementById('memberCount').value;
         const success = document.getElementById('success').value;
         const pointAmount = document.getElementById('pointAmount').value;
         const deadline = document.getElementById('deadline').value;
 
-        if (challengeName === '' || description === '' || memberCount === '' ||
-             success === '' || pointAmount === '' || deadline === ''
-         ) {
-            alert('비어있는 칸이 있습니다. 칸을 모두 채워주세요');
+        // 필수 필드 검사
+        if (
+            !challengeName ||
+            !description ||
+            !memberCount ||
+            !success ||
+            !pointAmount ||
+            !deadline
+        ) {
+            setError('비어있는 칸이 있습니다. 칸을 모두 채워주세요.');
             return;
         }
-        
+
+        // Description 유효성 검사
+        const descError = validateDescription(description);
+        if (descError) {
+            setDescriptionError(descError);
+            setError('설명 형식을 확인해주세요.');
+            return;
+        }
+
+        // 숫자 필드 검증
+        const memberCountNum = parseInt(memberCount, 10);
+        const successNum = parseInt(success, 10);
+        const pointAmountNum = parseInt(pointAmount, 10);
+        const deadlineNum = parseInt(deadline, 10);
+
+        if (
+            memberCountNum < 0 ||
+            successNum <= 0 ||
+            pointAmountNum <= 0 ||
+            deadlineNum <= 0
+        ) {
+            setError('숫자 값을 올바르게 입력해주세요.');
+            return;
+        }
+
         const data = {
-            challengeName: challengeName,
-            description: description,
-            memberCount: memberCount,
-            success: success,
-            pointAmount: pointAmount,
-            deadline: deadline
+            challengeName,
+            description,
+            memberCount: memberCountNum,
+            success: successNum,
+            pointAmount: pointAmountNum,
+            deadline: deadlineNum,
         };
 
+        setIsLoading(true);
+
         try {
-            const res = await api.post("/chalregis", data, {
-            headers: { Authorization: `Bearer ${token}` }
-            });
-            console.log("챌린지 추가 응답:", res.data);
-            navigate('challenge')
+            const res = await api.post('/chalregis', data);
+            console.log('챌린지 추가 응답:', res.data);
+
+            if (res.data.status === 'SUCCESS') {
+                alert('✅ 챌린지가 성공적으로 등록되었습니다!');
+                navigate('challenge');
+            } else {
+                setError(res.data.message || '챌린지 추가에 실패했습니다.');
+            }
         } catch (err) {
-            console.error("챌린지 추가 실패", err.response || err);
-            alert('챌린지 추가 실패');
-        }
+            console.error('챌린지 추가 실패', err.response || err);
 
+            if (err.response?.status === 401) {
+                setError('❌ 인증이 필요합니다. 다시 로그인해주세요.');
+            } else if (err.response?.status === 400) {
+                setError('❌ 입력 형식이 올바르지 않습니다.');
+            } else if (err.response?.data?.message) {
+                setError(`❌ ${err.response.data.message}`);
+            } else {
+                setError('❌ 챌린지 추가 중 오류가 발생했습니다.');
+            }
+        } finally {
+            setIsLoading(false);
+        }
     };
 
+    return (
+        <>
+            {/* 뒤로가기 버튼이 있는 헤더 */}
+            <div className='w-full bg-gradient-to-br from-[#4CAF50] to-[#8BC34A] py-6 text-white shadow-lg relative'>
+                {/* 뒤로가기 버튼 */}
+                <button
+                    onClick={() => navigate('challenge')}
+                    className='absolute left-4 top-1/2 -translate-y-1/2 p-2 hover:bg-white/20 rounded-full transition-colors'
+                    aria-label='뒤로가기'
+                >
+                    <svg
+                        xmlns='http://www.w3.org/2000/svg'
+                        fill='none'
+                        viewBox='0 0 24 24'
+                        strokeWidth={2.5}
+                        stroke='currentColor'
+                        className='w-6 h-6'
+                    >
+                        <path
+                            strokeLinecap='round'
+                            strokeLinejoin='round'
+                            d='M15.75 19.5L8.25 12l7.5-7.5'
+                        />
+                    </svg>
+                </button>
 
-
-
-  return (
-    <>
-      <div className="w-full bg-gradient-to-br from-[#4CAF50] to-[#8BC34A] py-10 text-center text-white mb-10 shadow-lg">
-        <h1 className="text-3xl font-bold mb-2">챌린지 추가</h1>
-        <p className="text-white text-opacity-90 text-sm">
-          환영합니다 관리자님 👋 추가할 챌린지를 작성해 주세요.
-        </p>
-      </div>
-
-      <div className="max-w-2xl mx-auto bg-white shadow-md rounded-lg p-8 space-y-6">
-        <h2 className="text-xl font-semibold text-gray-700 mb-4">챌린지 작성</h2>
-
-        <form className="space-y-4">
-          <div>
-            <label className="block font-medium text-gray-700 mb-1">챌린지명</label>
-            <input
-              type="text"
-              maxLength="16"
-              required
-              id="challengeName"
-              placeholder="따릉이 5km 타기"
-              className="w-full border border-gray-300 rounded-md px-3 py-2 focus:outline-none focus:ring-2 focus:ring-green-400"
-            />
-          </div>
-
-          <div>
-            <label className="block font-medium text-gray-700 mb-1">설명</label>
-            <input
-              type="text"
-              maxLength="32"
-              required
-              id="description"
-              placeholder="따릉이를 타고 인증을 통해 누적 5km를 채워보세요"
-              className="w-full border border-gray-300 rounded-md px-3 py-2 focus:outline-none focus:ring-2 focus:ring-green-400"
-            />
-          </div>
-
-          <div>
-            <label className="block font-medium text-gray-700 mb-1">시작 인원수</label>
-            <input
-              type="number"
-              id="memberCount"
-              required
-              readOnly
-              defaultValue="0"
-              className="w-full border border-gray-300 rounded-md px-3 py-2 focus:outline-none focus:ring-2 focus:ring-green-400"
-            />
-          </div>
-
-          <div>
-            <label className="block font-medium text-gray-700 mb-1">성공 조건</label>
-            <div className="flex items-center space-x-2">
-              <input
-                type="number"
-                id="success"
-                required
-                defaultValue="10"
-                className="w-full border border-gray-300 rounded-md px-3 py-2 focus:outline-none focus:ring-2 focus:ring-green-400"
-              />
-              <span className="text-gray-600">번 / km / 원</span>
+                {/* 제목 */}
+                <div className='text-center px-16'>
+                    <h1 className='text-2xl font-bold mb-1'>챌린지 추가</h1>
+                    <p className='text-white text-opacity-90 text-sm'>
+                        환영합니다 관리자님 👋
+                    </p>
+                </div>
             </div>
-          </div>
-
-          <div>
-            <label className="block font-medium text-gray-700 mb-1">지급 포인트</label>
-            <input
-              type="number"
-              id="pointAmount"
-              defaultValue="100"
-              required
-              className="w-full border border-gray-300 rounded-md px-3 py-2 focus:outline-none focus:ring-2 focus:ring-green-400"
-            />
-          </div>
-
-          <div>
-            <label className="block font-medium text-gray-700 mb-1">기한</label>
-            <div className="flex items-center space-x-2">
-              <input
-                type="number"
-                id="deadline"
-                required
-                defaultValue="7"
-                className="w-full border border-gray-300 rounded-md px-3 py-2 focus:outline-none focus:ring-2 focus:ring-green-400"
-              />
-              <span className="text-gray-600">일</span>
+
+            <div className='pt-6 pb-4 px-4'>
+                <p className='text-center text-gray-600 text-sm mb-6'>
+                    추가할 챌린지를 작성해 주세요.
+                </p>
             </div>
-          </div>
-
-          <div className="pt-6">
-            <button
-              type="button"
-              onClick={handleAddChallenge}
-              className="w-full bg-green-500 hover:bg-green-600 text-white font-semibold py-3 rounded-md shadow-md transition"
-            >
-              추가하기
-            </button>
-          </div>
-        </form>
-      </div>
-    </>
-  );
-}
 
+            <div className='max-w-2xl mx-auto bg-white shadow-md rounded-lg p-8 space-y-6 mb-10'>
+                <h2 className='text-xl font-semibold text-gray-700 mb-4'>
+                    챌린지 작성
+                </h2>
+
+                {/* 전역 에러 메시지 */}
+                {error && (
+                    <div className='bg-red-50 border border-red-200 text-red-700 px-4 py-3 rounded-md'>
+                        {error}
+                    </div>
+                )}
+
+                <form className='space-y-4'>
+                    <div>
+                        <label className='block font-medium text-gray-700 mb-1'>
+                            챌린지명
+                        </label>
+                        <input
+                            type='text'
+                            maxLength='16'
+                            required
+                            id='challengeName'
+                            placeholder='일주일 따릉이 타기'
+                            disabled={isLoading}
+                            className='w-full border border-gray-300 rounded-md px-3 py-2 focus:outline-none focus:ring-2 focus:ring-green-400 disabled:bg-gray-100 disabled:cursor-not-allowed'
+                        />
+                    </div>
 
+                    <div>
+                        <label className='block font-medium text-gray-700 mb-1'>
+                            설명 <span className='text-red-500'>*</span>
+                        </label>
+                        <input
+                            type='text'
+                            maxLength='32'
+                            required
+                            id='description'
+                            placeholder='따릉이 50km 이상 타기'
+                            onChange={handleDescriptionChange}
+                            disabled={isLoading}
+                            className={`w-full border rounded-md px-3 py-2 focus:outline-none focus:ring-2 disabled:bg-gray-100 disabled:cursor-not-allowed ${
+                                descriptionError
+                                    ? 'border-red-300 focus:ring-red-400'
+                                    : 'border-gray-300 focus:ring-green-400'
+                            }`}
+                        />
+                        {/* Description 규칙 안내 */}
+                        <p className='text-xs text-gray-500 mt-1'>
+                            💡 설명은 <strong>따릉이</strong>,{' '}
+                            <strong>전기차</strong>, <strong>수소차</strong>,{' '}
+                            <strong>재활용센터</strong>,{' '}
+                            <strong>제로웨이스트</strong> 중 하나로 시작해야
+                            합니다.
+                        </p>
+                        {/* Description 에러 메시지 */}
+                        {descriptionError && (
+                            <p className='text-xs text-red-600 mt-1'>
+                                {descriptionError}
+                            </p>
+                        )}
+                    </div>
+
+                    <div>
+                        <label className='block font-medium text-gray-700 mb-1'>
+                            시작 인원수
+                        </label>
+                        <input
+                            type='number'
+                            id='memberCount'
+                            required
+                            readOnly
+                            defaultValue='0'
+                            disabled={isLoading}
+                            className='w-full border border-gray-300 rounded-md px-3 py-2 bg-gray-50 cursor-not-allowed'
+                        />
+                        <p className='text-xs text-gray-500 mt-1'>
+                            초기 참여 인원수는 0으로 고정됩니다.
+                        </p>
+                    </div>
+
+                    <div>
+                        <label className='block font-medium text-gray-700 mb-1'>
+                            성공 조건
+                        </label>
+                        <div className='flex items-center space-x-2'>
+                            <input
+                                type='number'
+                                id='success'
+                                required
+                                min='1'
+                                defaultValue='50'
+                                disabled={isLoading}
+                                className='w-full border border-gray-300 rounded-md px-3 py-2 focus:outline-none focus:ring-2 focus:ring-green-400 disabled:bg-gray-100 disabled:cursor-not-allowed'
+                            />
+                            <span className='text-gray-600 whitespace-nowrap'>
+                                km / 원
+                            </span>
+                        </div>
+                        <p className='text-xs text-gray-500 mt-1'>
+                            따릉이는 km, 충전/상점은 원(₩) 단위입니다.
+                        </p>
+                    </div>
+
+                    <div>
+                        <label className='block font-medium text-gray-700 mb-1'>
+                            지급 포인트
+                        </label>
+                        <input
+                            type='number'
+                            id='pointAmount'
+                            defaultValue='500'
+                            min='1'
+                            required
+                            disabled={isLoading}
+                            className='w-full border border-gray-300 rounded-md px-3 py-2 focus:outline-none focus:ring-2 focus:ring-green-400 disabled:bg-gray-100 disabled:cursor-not-allowed'
+                        />
+                    </div>
+
+                    <div>
+                        <label className='block font-medium text-gray-700 mb-1'>
+                            기한
+                        </label>
+                        <div className='flex items-center space-x-2'>
+                            <input
+                                type='number'
+                                id='deadline'
+                                required
+                                min='1'
+                                defaultValue='7'
+                                disabled={isLoading}
+                                className='w-full border border-gray-300 rounded-md px-3 py-2 focus:outline-none focus:ring-2 focus:ring-green-400 disabled:bg-gray-100 disabled:cursor-not-allowed'
+                            />
+                            <span className='text-gray-600'>일</span>
+                        </div>
+                    </div>
+
+                    <div className='pt-6'>
+                        <button
+                            type='button'
+                            onClick={handleAddChallenge}
+                            disabled={isLoading || descriptionError}
+                            className='w-full bg-green-500 hover:bg-green-600 text-white font-semibold py-3 rounded-md shadow-md transition disabled:bg-gray-400 disabled:cursor-not-allowed'
+                        >
+                            {isLoading ? (
+                                <span className='flex items-center justify-center'>
+                                    <svg
+                                        className='animate-spin -ml-1 mr-3 h-5 w-5 text-white'
+                                        xmlns='http://www.w3.org/2000/svg'
+                                        fill='none'
+                                        viewBox='0 0 24 24'
+                                    >
+                                        <circle
+                                            className='opacity-25'
+                                            cx='12'
+                                            cy='12'
+                                            r='10'
+                                            stroke='currentColor'
+                                            strokeWidth='4'
+                                        ></circle>
+                                        <path
+                                            className='opacity-75'
+                                            fill='currentColor'
+                                            d='M4 12a8 8 0 018-8V0C5.373 0 0 5.373 0 12h4zm2 5.291A7.962 7.962 0 014 12H0c0 3.042 1.135 5.824 3 7.938l3-2.647z'
+                                        ></path>
+                                    </svg>
+                                    등록 중...
+                                </span>
+                            ) : (
+                                '추가하기'
+                            )}
+                        </button>
+                    </div>
+                </form>
+
+                {/* 챌린지 타입 안내 */}
+                <div className='bg-blue-50 border border-blue-200 rounded-md p-4 text-sm'>
+                    <h3 className='font-semibold text-blue-900 mb-2'>
+                        📋 챌린지 타입 안내
+                    </h3>
+                    <ul className='space-y-1 text-blue-800'>
+                        <li>
+                            • <strong>따릉이</strong>: 자전거 이용 챌린지 (거리
+                            기준, km 단위)
+                        </li>
+                        <li>
+                            • <strong>전기차</strong>: 전기차 충전 챌린지
+                            (충전비용 기준, 원 단위)
+                        </li>
+                        <li>
+                            • <strong>수소차</strong>: 수소차 충전 챌린지
+                            (충전비용 기준, 원 단위)
+                        </li>
+                        <li>
+                            • <strong>재활용센터</strong>: 재활용센터 방문
+                            챌린지 (구매금액 기준, 원 단위)
+                        </li>
+                        <li>
+                            • <strong>제로웨이스트</strong>: 제로웨이스트 상점
+                            이용 챌린지 (구매금액 기준, 원 단위)
+                        </li>
+                    </ul>
+                    <p className='mt-2 text-xs text-blue-700'>
+                        💡 사용자가 인증을 완료하면 백엔드에서 자동으로 챌린지
+                        진행률이 업데이트됩니다.
+                    </p>
+                </div>
+            </div>
+        </>
+    );
+}