diff --git a/backend/app.py b/backend/app.py
index 9e30191..3b26ab8 100644
--- a/backend/app.py
+++ b/backend/app.py
@@ -5782,6 +5782,115 @@ def api_delete_product_image(barcode):
         return jsonify({'success': False, 'error': str(e)}), 500
 
 
+@app.route('/api/admin/product-images/<barcode>/replace', methods=['POST'])
+def api_replace_product_image(barcode):
+    """이미지 URL로 교체"""
+    import sqlite3
+    import requests
+    import base64
+    from PIL import Image
+    from io import BytesIO
+    
+    try:
+        data = request.get_json()
+        image_url = data.get('image_url', '').strip()
+        
+        if not image_url:
+            return jsonify({'success': False, 'error': 'URL 필요'}), 400
+        
+        # 다양한 User-Agent와 헤더로 시도
+        headers_list = [
+            {
+                'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36',
+                'Accept': 'image/avif,image/webp,image/apng,image/svg+xml,image/*,*/*;q=0.8',
+                'Accept-Language': 'ko-KR,ko;q=0.9,en-US;q=0.8,en;q=0.7',
+                'Referer': 'https://www.google.com/',
+            },
+            {
+                'User-Agent': 'Mozilla/5.0 (iPhone; CPU iPhone OS 16_0 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/16.0 Mobile/15E148 Safari/604.1',
+                'Accept': 'image/*,*/*;q=0.8',
+            },
+            {
+                'User-Agent': 'Googlebot-Image/1.0',
+            }
+        ]
+        
+        response = None
+        for headers in headers_list:
+            try:
+                response = requests.get(image_url, headers=headers, timeout=15, allow_redirects=True)
+                if response.status_code == 200 and len(response.content) > 1000:
+                    break
+            except:
+                continue
+        
+        if not response or response.status_code != 200:
+            return jsonify({'success': False, 'error': f'이미지 다운로드 실패 (상태: {response.status_code if response else "연결실패"})'}), 400
+        
+        # PIL로 이미지 처리
+        try:
+            img = Image.open(BytesIO(response.content))
+            
+            # RGBA -> RGB 변환
+            if img.mode == 'RGBA':
+                bg = Image.new('RGB', img.size, (255, 255, 255))
+                bg.paste(img, mask=img.split()[3])
+                img = bg
+            elif img.mode != 'RGB':
+                img = img.convert('RGB')
+            
+            # 리사이즈 (최대 500px)
+            max_size = 500
+            if max(img.size) > max_size:
+                ratio = max_size / max(img.size)
+                new_size = tuple(int(dim * ratio) for dim in img.size)
+                img = img.resize(new_size, Image.LANCZOS)
+            
+            # base64 변환
+            buffer = BytesIO()
+            img.save(buffer, format='JPEG', quality=85)
+            image_base64 = base64.b64encode(buffer.getvalue()).decode('utf-8')
+            
+            # 썸네일 생성
+            thumb_size = 100
+            ratio = thumb_size / max(img.size)
+            thumb_img = img.resize(tuple(int(dim * ratio) for dim in img.size), Image.LANCZOS)
+            thumb_buffer = BytesIO()
+            thumb_img.save(thumb_buffer, format='JPEG', quality=80)
+            thumbnail_base64 = base64.b64encode(thumb_buffer.getvalue()).decode('utf-8')
+            
+        except Exception as e:
+            return jsonify({'success': False, 'error': f'이미지 처리 실패: {str(e)}'}), 400
+        
+        # SQLite 업데이트
+        db_path = os.path.join(os.path.dirname(__file__), 'db', 'product_images.db')
+        conn = sqlite3.connect(db_path)
+        cursor = conn.cursor()
+        
+        cursor.execute("""
+            UPDATE product_images 
+            SET image_base64 = ?, thumbnail_base64 = ?, image_url = ?, 
+                status = 'manual', error_message = NULL, updated_at = datetime('now')
+            WHERE barcode = ?
+        """, (image_base64, thumbnail_base64, image_url, barcode))
+        
+        if cursor.rowcount == 0:
+            # 레코드가 없으면 새로 생성
+            cursor.execute("""
+                INSERT INTO product_images (barcode, image_base64, thumbnail_base64, image_url, status, product_name)
+                VALUES (?, ?, ?, ?, 'manual', ?)
+            """, (barcode, image_base64, thumbnail_base64, image_url, barcode))
+        
+        conn.commit()
+        conn.close()
+        
+        return jsonify({'success': True, 'message': '이미지 교체 완료'})
+        
+    except Exception as e:
+        logging.error(f"이미지 교체 오류: {e}")
+        return jsonify({'success': False, 'error': str(e)}), 500
+
+
 @app.route('/api/admin/product-images/stats')
 def api_product_images_stats():
     """이미지 통계"""
diff --git a/backend/templates/admin_product_images.html b/backend/templates/admin_product_images.html
index 0a9cd35..efac690 100644
--- a/backend/templates/admin_product_images.html
+++ b/backend/templates/admin_product_images.html
@@ -410,6 +410,32 @@
         </div>
     </div>
     
+    <!-- 이미지 교체 모달 -->
+    <div class="modal" id="replaceModal">
+        <div class="modal-content" style="max-width: 500px;">
+            <h3>🔄 이미지 교체</h3>
+            <p style="color: #9ca3af; margin-bottom: 8px; font-size: 13px;">
+                구글 이미지 등에서 찾은 URL을 붙여넣으세요
+            </p>
+            <div id="replaceProductInfo" style="background: rgba(139,92,246,0.1); border-radius: 8px; padding: 12px; margin-bottom: 16px;">
+                <div style="font-weight: 600;" id="replaceProductName"></div>
+                <div style="font-size: 12px; color: #a855f7; font-family: monospace;" id="replaceBarcode"></div>
+            </div>
+            <div style="margin-bottom: 16px;">
+                <label style="display: block; margin-bottom: 4px; font-size: 13px;">이미지 URL *</label>
+                <input type="text" id="replaceImageUrl" class="search-box" style="width: 100%;" 
+                       placeholder="https://example.com/image.jpg">
+                <div style="font-size: 11px; color: #6b7280; margin-top: 4px;">
+                    💡 이미지 우클릭 → "이미지 주소 복사"로 URL을 가져오세요
+                </div>
+            </div>
+            <div style="text-align: right;">
+                <button class="btn btn-secondary" onclick="closeReplaceModal()">취소</button>
+                <button class="btn btn-primary" onclick="submitReplace()">교체하기</button>
+            </div>
+        </div>
+    </div>
+    
     <!-- 상세 모달 -->
     <div class="modal" id="detailModal">
         <div class="modal-content">
@@ -478,6 +504,7 @@
                                 <span class="status ${item.status}">${getStatusText(item.status)}</span>
                                 <div class="actions">
                                     <button class="btn btn-secondary btn-sm" onclick="viewDetail('${item.barcode}')">상세</button>
+                                    <button class="btn btn-primary btn-sm" onclick="openReplaceModal('${item.barcode}', '${escapeHtml(item.product_name)}')">교체</button>
                                     <button class="btn btn-danger btn-sm" onclick="deleteImage('${item.barcode}')">삭제</button>
                                 </div>
                             </div>
@@ -712,11 +739,65 @@
             }
         }
         
+        // 이미지 교체
+        let replaceTargetBarcode = null;
+        
+        function openReplaceModal(barcode, productName) {
+            replaceTargetBarcode = barcode;
+            document.getElementById('replaceProductName').textContent = productName || barcode;
+            document.getElementById('replaceBarcode').textContent = barcode;
+            document.getElementById('replaceImageUrl').value = '';
+            document.getElementById('replaceModal').classList.add('show');
+            document.getElementById('replaceImageUrl').focus();
+        }
+        
+        function closeReplaceModal() {
+            document.getElementById('replaceModal').classList.remove('show');
+            replaceTargetBarcode = null;
+        }
+        
+        async function submitReplace() {
+            const imageUrl = document.getElementById('replaceImageUrl').value.trim();
+            
+            if (!imageUrl) {
+                showToast('이미지 URL을 입력하세요', 'error');
+                return;
+            }
+            
+            if (!imageUrl.startsWith('http')) {
+                showToast('올바른 URL을 입력하세요 (http:// 또는 https://)', 'error');
+                return;
+            }
+            
+            closeReplaceModal();
+            showToast('이미지 다운로드 중...', 'info');
+            
+            try {
+                const res = await fetch(`/api/admin/product-images/${replaceTargetBarcode}/replace`, {
+                    method: 'POST',
+                    headers: { 'Content-Type': 'application/json' },
+                    body: JSON.stringify({ image_url: imageUrl })
+                });
+                const data = await res.json();
+                
+                if (data.success) {
+                    showToast('✅ 이미지 교체 완료!', 'success');
+                    loadStats();
+                    loadImages();
+                } else {
+                    showToast(data.error || '교체 실패', 'error');
+                }
+            } catch (err) {
+                showToast('오류: ' + err.message, 'error');
+            }
+        }
+        
         // ESC로 모달 닫기
         document.addEventListener('keydown', (e) => {
             if (e.key === 'Escape') {
                 closeModal();
                 closeManualCrawl();
+                closeReplaceModal();
             }
         });
         
@@ -728,6 +809,10 @@
         document.getElementById('manualCrawlModal').addEventListener('click', (e) => {
             if (e.target.id === 'manualCrawlModal') closeManualCrawl();
         });
+        
+        document.getElementById('replaceModal').addEventListener('click', (e) => {
+            if (e.target.id === 'replaceModal') closeReplaceModal();
+        });
     </script>
 </body>
 </html>