diff --git a/api.hyungi.net/models/monthlyStatusModel.js b/api.hyungi.net/models/monthlyStatusModel.js
index 31303e1..7f97e07 100644
--- a/api.hyungi.net/models/monthlyStatusModel.js
+++ b/api.hyungi.net/models/monthlyStatusModel.js
@@ -41,36 +41,47 @@ class MonthlyStatusModel {
   }
   
   // 특정 날짜의 작업자별 상태 조회 (모달용)
+  // ✅ 리팩토링: 집계 테이블 대신 daily_work_reports에서 직접 조회 (중복 문제 완전 해결)
   static async getDailyWorkerStatus(date) {
     const db = await getDb();
     
     try {
-      // 중복 방지: worker_id와 date로 그룹화하고 최신 데이터만 조회
-      const [rows] = await db.execute(`
+      // daily_work_reports에서 직접 집계하여 조회 (중복 없음 보장)
+      const [rows] = await db.query(`
         SELECT 
-          mws.worker_id,
+          dwr.worker_id,
           w.worker_name,
           w.job_type,
-          MAX(mws.year) as year,
-          MAX(mws.month) as month,
-          mws.date,
-          SUM(mws.total_work_hours) as total_work_hours,
-          SUM(mws.actual_work_hours) as actual_work_hours,
-          SUM(mws.vacation_hours) as vacation_hours,
-          SUM(mws.total_work_count) as total_work_count,
-          SUM(mws.regular_work_count) as regular_work_count,
-          SUM(mws.error_work_count) as error_work_count,
-          MAX(mws.work_status) as work_status,
-          MAX(mws.has_vacation) as has_vacation,
-          MAX(mws.has_error) as has_error,
-          MAX(mws.has_issues) as has_issues,
-          MAX(mws.last_updated) as last_updated
-        FROM monthly_worker_status mws
-        JOIN workers w ON mws.worker_id = w.worker_id
-        WHERE mws.date = ?
-        GROUP BY mws.worker_id, mws.date, w.worker_name, w.job_type
+          YEAR(?) as year,
+          MONTH(?) as month,
+          ? as date,
+          COALESCE(SUM(dwr.work_hours), 0) as total_work_hours,
+          COALESCE(SUM(CASE WHEN dwr.project_id != 13 THEN dwr.work_hours ELSE 0 END), 0) as actual_work_hours,
+          COALESCE(SUM(CASE WHEN dwr.project_id = 13 THEN dwr.work_hours ELSE 0 END), 0) as vacation_hours,
+          COUNT(*) as total_work_count,
+          COUNT(CASE WHEN dwr.project_id != 13 AND dwr.work_status_id != 2 THEN 1 END) as regular_work_count,
+          COUNT(CASE WHEN dwr.work_status_id = 2 THEN 1 END) as error_work_count,
+          CASE 
+            WHEN MAX(CASE WHEN dwr.work_status_id = 2 THEN 1 ELSE 0 END) = 1 THEN 'error'
+            WHEN SUM(dwr.work_hours) > 12 THEN 'overtime-warning'
+            WHEN SUM(dwr.work_hours) > 8 THEN 'overtime'
+            WHEN SUM(dwr.work_hours) = 8 THEN 'complete'
+            WHEN SUM(dwr.work_hours) > 0 THEN 'partial'
+            ELSE 'incomplete'
+          END as work_status,
+          MAX(CASE WHEN dwr.project_id = 13 THEN 1 ELSE 0 END) as has_vacation,
+          MAX(CASE WHEN dwr.work_status_id = 2 THEN 1 ELSE 0 END) as has_error,
+          CASE 
+            WHEN SUM(dwr.work_hours) < 8 AND SUM(dwr.work_hours) > 0 THEN 1
+            ELSE 0
+          END as has_issues,
+          MAX(dwr.created_at) as last_updated
+        FROM daily_work_reports dwr
+        JOIN workers w ON dwr.worker_id = w.worker_id
+        WHERE dwr.report_date = ?
+        GROUP BY dwr.worker_id, w.worker_name, w.job_type
         ORDER BY w.worker_name ASC
-      `, [date]);
+      `, [date, date, date, date]);
       
       return rows;
     } catch (error) {
diff --git a/api.hyungi.net/package.json b/api.hyungi.net/package.json
index 2926d99..3a0fd55 100644
--- a/api.hyungi.net/package.json
+++ b/api.hyungi.net/package.json
@@ -1,6 +1,6 @@
 {
   "name": "hyungi-api",
-  "version": "1.0.0",
+  "version": "2.2.0",
   "main": "index.js",
   "scripts": {
     "start": "pm2-runtime start ecosystem.config.js --env production",
diff --git a/synology_deployment.tar.gz b/synology_deployment.tar.gz
new file mode 100644
index 0000000..64e5396
Binary files /dev/null and b/synology_deployment.tar.gz differ
diff --git a/synology_deployment/api/controllers/dailyWorkReportController.js b/synology_deployment/api/controllers/dailyWorkReportController.js
index 23a23af..ee8ee3d 100644
--- a/synology_deployment/api/controllers/dailyWorkReportController.js
+++ b/synology_deployment/api/controllers/dailyWorkReportController.js
@@ -368,17 +368,28 @@ const updateWorkReport = async (req, res) => {
 
 /**
  * 🗑️ 특정 작업보고서 삭제 (V2 - Service Layer 사용)
+ * 권한: 그룹장(group_leader), 시스템(system), 관리자(admin)만 가능
  */
 const removeDailyWorkReport = async (req, res) => {
   try {
     const { id: reportId } = req.params;
     const userInfo = {
       user_id: req.user?.user_id || req.user?.id,
+      access_level: req.user?.access_level || req.user?.role,
     };
 
     if (!userInfo.user_id) {
       return res.status(401).json({ error: '사용자 인증 정보가 없습니다.' });
     }
+
+    // 권한 체크: 그룹장, 시스템, 관리자만 삭제 가능
+    const allowedRoles = ['admin', 'system', 'group_leader'];
+    if (!allowedRoles.includes(userInfo.access_level)) {
+      return res.status(403).json({ 
+        error: '작업보고서 삭제 권한이 없습니다.',
+        details: '그룹장 이상의 권한이 필요합니다.'
+      });
+    }
     
     const result = await dailyWorkReportService.removeDailyWorkReportService(reportId, userInfo);
     
@@ -405,6 +416,7 @@ const removeDailyWorkReport = async (req, res) => {
 const removeDailyWorkReportByDateAndWorker = (req, res) => {
   const { date, worker_id } = req.params;
   const deleted_by = req.user?.user_id || req.user?.id;
+  const access_level = req.user?.access_level || req.user?.role;
 
   if (!deleted_by) {
     return res.status(401).json({ 
@@ -412,6 +424,15 @@ const removeDailyWorkReportByDateAndWorker = (req, res) => {
     });
   }
 
+  // 권한 체크: 그룹장, 시스템, 관리자만 삭제 가능
+  const allowedRoles = ['admin', 'system', 'group_leader'];
+  if (!allowedRoles.includes(access_level)) {
+    return res.status(403).json({ 
+      error: '작업보고서 삭제 권한이 없습니다.',
+      details: '그룹장 이상의 권한이 필요합니다.'
+    });
+  }
+
   console.log(`🗑️ 날짜+작업자별 전체 삭제 요청: date=${date}, worker_id=${worker_id}, 삭제자=${deleted_by}`);
 
   dailyWorkReportModel.removeByDateAndWorker(date, worker_id, deleted_by, (err, affectedRows) => {
diff --git a/synology_deployment/api/migrations/009_fix_duplicate_monthly_status.sql b/synology_deployment/api/migrations/009_fix_duplicate_monthly_status.sql
new file mode 100644
index 0000000..46e840d
--- /dev/null
+++ b/synology_deployment/api/migrations/009_fix_duplicate_monthly_status.sql
@@ -0,0 +1,72 @@
+-- 009_fix_duplicate_monthly_status.sql
+-- monthly_worker_status 테이블의 중복 데이터 정리
+
+-- 1. 중복 데이터 확인 (디버깅용)
+-- SELECT worker_id, date, COUNT(*) as cnt
+-- FROM monthly_worker_status
+-- GROUP BY worker_id, date
+-- HAVING cnt > 1;
+
+-- 2. 중복 데이터 정리: 같은 worker_id, date에 대해 최신 데이터만 남기고 나머지 삭제
+DELETE mws1 FROM monthly_worker_status mws1
+INNER JOIN (
+    SELECT 
+        worker_id,
+        date,
+        MAX(id) as keep_id
+    FROM monthly_worker_status
+    GROUP BY worker_id, date
+) mws2 ON mws1.worker_id = mws2.worker_id 
+    AND mws1.date = mws2.date 
+    AND mws1.id < mws2.keep_id;
+
+-- 3. 중복 제거 후 데이터 재집계 (선택사항)
+-- 만약 합산이 필요하다면 다음 프로시저를 실행
+DELIMITER $$
+
+CREATE OR REPLACE PROCEDURE ConsolidateDuplicateMonthlyStatus()
+BEGIN
+    DECLARE done INT DEFAULT FALSE;
+    DECLARE v_worker_id INT;
+    DECLARE v_date DATE;
+    
+    -- 중복이 있는 worker_id, date 조합 찾기
+    DECLARE cur CURSOR FOR
+        SELECT worker_id, date
+        FROM monthly_worker_status
+        GROUP BY worker_id, date
+        HAVING COUNT(*) > 1;
+    
+    DECLARE CONTINUE HANDLER FOR NOT FOUND SET done = TRUE;
+    
+    OPEN cur;
+    
+    read_loop: LOOP
+        FETCH cur INTO v_worker_id, v_date;
+        IF done THEN
+            LEAVE read_loop;
+        END IF;
+        
+        -- 해당 작업자의 해당 날짜 데이터를 재계산하여 업데이트
+        CALL UpdateMonthlyWorkerStatus(v_date, v_worker_id);
+    END LOOP;
+    
+    CLOSE cur;
+END$$
+
+DELIMITER ;
+
+-- 4. 프로시저 실행하여 중복 데이터 통합
+-- CALL ConsolidateDuplicateMonthlyStatus();
+
+-- 5. 확인: 중복이 남아있는지 체크
+SELECT 
+    '중복 체크 완료' as message,
+    COUNT(*) as remaining_duplicates
+FROM (
+    SELECT worker_id, date, COUNT(*) as cnt
+    FROM monthly_worker_status
+    GROUP BY worker_id, date
+    HAVING cnt > 1
+) duplicates;
+
diff --git a/synology_deployment/api/models/monthlyStatusModel.js b/synology_deployment/api/models/monthlyStatusModel.js
index 31303e1..7f97e07 100644
--- a/synology_deployment/api/models/monthlyStatusModel.js
+++ b/synology_deployment/api/models/monthlyStatusModel.js
@@ -41,36 +41,47 @@ class MonthlyStatusModel {
   }
   
   // 특정 날짜의 작업자별 상태 조회 (모달용)
+  // ✅ 리팩토링: 집계 테이블 대신 daily_work_reports에서 직접 조회 (중복 문제 완전 해결)
   static async getDailyWorkerStatus(date) {
     const db = await getDb();
     
     try {
-      // 중복 방지: worker_id와 date로 그룹화하고 최신 데이터만 조회
-      const [rows] = await db.execute(`
+      // daily_work_reports에서 직접 집계하여 조회 (중복 없음 보장)
+      const [rows] = await db.query(`
         SELECT 
-          mws.worker_id,
+          dwr.worker_id,
           w.worker_name,
           w.job_type,
-          MAX(mws.year) as year,
-          MAX(mws.month) as month,
-          mws.date,
-          SUM(mws.total_work_hours) as total_work_hours,
-          SUM(mws.actual_work_hours) as actual_work_hours,
-          SUM(mws.vacation_hours) as vacation_hours,
-          SUM(mws.total_work_count) as total_work_count,
-          SUM(mws.regular_work_count) as regular_work_count,
-          SUM(mws.error_work_count) as error_work_count,
-          MAX(mws.work_status) as work_status,
-          MAX(mws.has_vacation) as has_vacation,
-          MAX(mws.has_error) as has_error,
-          MAX(mws.has_issues) as has_issues,
-          MAX(mws.last_updated) as last_updated
-        FROM monthly_worker_status mws
-        JOIN workers w ON mws.worker_id = w.worker_id
-        WHERE mws.date = ?
-        GROUP BY mws.worker_id, mws.date, w.worker_name, w.job_type
+          YEAR(?) as year,
+          MONTH(?) as month,
+          ? as date,
+          COALESCE(SUM(dwr.work_hours), 0) as total_work_hours,
+          COALESCE(SUM(CASE WHEN dwr.project_id != 13 THEN dwr.work_hours ELSE 0 END), 0) as actual_work_hours,
+          COALESCE(SUM(CASE WHEN dwr.project_id = 13 THEN dwr.work_hours ELSE 0 END), 0) as vacation_hours,
+          COUNT(*) as total_work_count,
+          COUNT(CASE WHEN dwr.project_id != 13 AND dwr.work_status_id != 2 THEN 1 END) as regular_work_count,
+          COUNT(CASE WHEN dwr.work_status_id = 2 THEN 1 END) as error_work_count,
+          CASE 
+            WHEN MAX(CASE WHEN dwr.work_status_id = 2 THEN 1 ELSE 0 END) = 1 THEN 'error'
+            WHEN SUM(dwr.work_hours) > 12 THEN 'overtime-warning'
+            WHEN SUM(dwr.work_hours) > 8 THEN 'overtime'
+            WHEN SUM(dwr.work_hours) = 8 THEN 'complete'
+            WHEN SUM(dwr.work_hours) > 0 THEN 'partial'
+            ELSE 'incomplete'
+          END as work_status,
+          MAX(CASE WHEN dwr.project_id = 13 THEN 1 ELSE 0 END) as has_vacation,
+          MAX(CASE WHEN dwr.work_status_id = 2 THEN 1 ELSE 0 END) as has_error,
+          CASE 
+            WHEN SUM(dwr.work_hours) < 8 AND SUM(dwr.work_hours) > 0 THEN 1
+            ELSE 0
+          END as has_issues,
+          MAX(dwr.created_at) as last_updated
+        FROM daily_work_reports dwr
+        JOIN workers w ON dwr.worker_id = w.worker_id
+        WHERE dwr.report_date = ?
+        GROUP BY dwr.worker_id, w.worker_name, w.job_type
         ORDER BY w.worker_name ASC
-      `, [date]);
+      `, [date, date, date, date]);
       
       return rows;
     } catch (error) {
diff --git a/synology_deployment/api/package.json b/synology_deployment/api/package.json
index 2926d99..3a0fd55 100644
--- a/synology_deployment/api/package.json
+++ b/synology_deployment/api/package.json
@@ -1,6 +1,6 @@
 {
   "name": "hyungi-api",
-  "version": "1.0.0",
+  "version": "2.2.0",
   "main": "index.js",
   "scripts": {
     "start": "pm2-runtime start ecosystem.config.js --env production",
diff --git a/synology_deployment/update.sh b/synology_deployment/update.sh
new file mode 100644
index 0000000..80aaf20
--- /dev/null
+++ b/synology_deployment/update.sh
@@ -0,0 +1,81 @@
+#!/bin/bash
+# ============================================================
+# 시놀로지 NAS 안전 업데이트 스크립트
+# Technical Korea Work Management System v2.2.0
+# ============================================================
+# 
+# ⚠️ 주의: 이 스크립트는 DB 데이터를 보존하면서 코드만 업데이트합니다.
+#
+# 사용법:
+#   cd /volume2/docker/synology_deployment
+#   chmod +x update.sh
+#   sudo ./update.sh
+#
+# ============================================================
+
+set -e
+
+echo ""
+echo "============================================================"
+echo "🚀 Technical Korea Work Management System 업데이트"
+echo "   버전: v2.2.0"
+echo "============================================================"
+echo ""
+
+# 현재 디렉토리 확인
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+cd "$SCRIPT_DIR"
+
+echo "📁 작업 디렉토리: $SCRIPT_DIR"
+echo ""
+
+# 1. 현재 실행 중인 컨테이너 확인
+echo "🔍 현재 컨테이너 상태 확인..."
+docker-compose ps
+
+echo ""
+echo "⏸️  API 컨테이너만 재시작합니다. (DB 데이터 보존)"
+echo ""
+
+# 2. API 컨테이너만 재빌드 및 재시작 (DB는 그대로 유지)
+echo "🔄 API 컨테이너 재빌드 중..."
+docker-compose build api
+
+echo ""
+echo "🔄 API 컨테이너 재시작 중..."
+docker-compose up -d api
+
+echo ""
+echo "⏳ 서버 시작 대기 중... (10초)"
+sleep 10
+
+# 3. 로그 확인
+echo ""
+echo "📋 API 서버 로그 (최근 30줄):"
+echo "------------------------------------------------------------"
+docker-compose logs --tail=30 api
+
+# 4. 헬스체크
+echo ""
+echo "🏥 헬스체크 중..."
+if curl -s http://localhost:20005/api/health > /dev/null 2>&1; then
+    echo "✅ API 서버 정상 작동 중!"
+else
+    echo "⚠️  API 서버 응답 없음. 로그를 확인하세요:"
+    echo "   docker-compose logs api"
+fi
+
+echo ""
+echo "============================================================"
+echo "✅ 업데이트 완료!"
+echo ""
+echo "📌 확인사항:"
+echo "   - 브라우저에서 Ctrl+Shift+R (하드 리프레시)"
+echo "   - http://192.168.0.3:20000 접속 테스트"
+echo ""
+echo "📌 문제 발생 시:"
+echo "   - 로그 확인: docker-compose logs api"
+echo "   - 재시작: docker-compose restart api"
+echo "============================================================"
+echo ""
+
diff --git a/synology_deployment/web-ui/css/daily-work-report.css b/synology_deployment/web-ui/css/daily-work-report.css
index 86d7597..cba6e55 100644
--- a/synology_deployment/web-ui/css/daily-work-report.css
+++ b/synology_deployment/web-ui/css/daily-work-report.css
@@ -351,25 +351,33 @@
 }
 
 .remove-work-btn {
-  width: 40px;
-  height: 40px;
-  border-radius: var(--radius-full);
-  background: linear-gradient(135deg, var(--error-500), var(--error-600));
+  width: 36px;
+  height: 36px;
+  border-radius: 50%;
+  background: linear-gradient(135deg, #ef4444, #dc2626);
   color: white;
   border: none;
   cursor: pointer;
   display: flex;
   align-items: center;
   justify-content: center;
+  font-size: 18px;
+  font-weight: bold;
+  box-shadow: 0 2px 8px rgba(239, 68, 68, 0.4);
+  transition: all 0.2s ease;
   transition: var(--transition-normal);
   font-size: var(--text-lg);
   box-shadow: var(--shadow-sm);
 }
 
 .remove-work-btn:hover {
-  background: linear-gradient(135deg, var(--error-600), var(--error-700));
-  transform: scale(1.1) rotate(90deg);
-  box-shadow: var(--shadow-md);
+  background: linear-gradient(135deg, #dc2626, #b91c1c);
+  transform: scale(1.15);
+  box-shadow: 0 4px 12px rgba(239, 68, 68, 0.5);
+}
+
+.remove-work-btn:active {
+  transform: scale(0.95);
 }
 
 .work-entry-grid {
diff --git a/synology_deployment/web-ui/css/work-report-calendar.css b/synology_deployment/web-ui/css/work-report-calendar.css
index 14e34f0..8a69d83 100644
--- a/synology_deployment/web-ui/css/work-report-calendar.css
+++ b/synology_deployment/web-ui/css/work-report-calendar.css
@@ -664,6 +664,32 @@
   transform: scale(1.05);
 }
 
+/* 작업 삭제 버튼 (관리자/그룹장용) */
+.btn-delete-worker-work {
+  background: linear-gradient(135deg, #ef4444, #dc2626);
+  color: white;
+  border: none;
+  padding: 0.4rem 0.6rem;
+  border-radius: 0.5rem;
+  font-size: 0.875rem;
+  cursor: pointer;
+  transition: all 0.2s ease;
+  margin-right: 0.5rem;
+}
+
+.btn-delete-worker-work:hover {
+  background: linear-gradient(135deg, #dc2626, #b91c1c);
+  transform: scale(1.1);
+  box-shadow: 0 4px 12px rgba(239, 68, 68, 0.4);
+}
+
+/* 작업자 액션 버튼 컨테이너 */
+.worker-actions {
+  display: flex;
+  align-items: center;
+  gap: 0.5rem;
+}
+
 /* 캘린더 페이지 컨테이너 */
 .calendar-page-container {
   max-width: 1000px;
diff --git a/synology_deployment/web-ui/js/daily-work-report.js b/synology_deployment/web-ui/js/daily-work-report.js
index a551527..f9f13e2 100644
--- a/synology_deployment/web-ui/js/daily-work-report.js
+++ b/synology_deployment/web-ui/js/daily-work-report.js
@@ -334,8 +334,8 @@ function addWorkEntry() {
   entryDiv.innerHTML = `
     <div class="work-entry-header">
       <div class="work-entry-title">작업 항목 #${workEntryCounter}</div>
-      <button type="button" class="remove-work-btn" onclick="removeWorkEntry(${workEntryCounter})">
-        <i class="fas fa-times"></i>
+      <button type="button" class="remove-work-btn" onclick="removeWorkEntry(${workEntryCounter})" title="이 작업 삭제">
+        ✕
       </button>
     </div>
     
diff --git a/synology_deployment/web-ui/js/work-report-calendar.js b/synology_deployment/web-ui/js/work-report-calendar.js
index ef5f254..eacc3e3 100644
--- a/synology_deployment/web-ui/js/work-report-calendar.js
+++ b/synology_deployment/web-ui/js/work-report-calendar.js
@@ -591,6 +591,17 @@ async function renderModalDataFromSummary(workers, summary) {
     // 작업자 이름의 첫 글자 추출
     const initial = worker.workerName ? worker.workerName.charAt(0) : '?';
 
+    // 관리자/그룹장 권한 확인
+    const currentUser = JSON.parse(localStorage.getItem('user') || '{}');
+    const isAdmin = ['admin', 'system', 'group_leader'].includes(currentUser.access_level || currentUser.role);
+    
+    // 삭제 버튼 (관리자/그룹장만 표시, 작업이 있는 경우에만)
+    const deleteBtn = isAdmin && worker.totalWorkCount > 0 ? `
+      <button class="btn-delete-worker-work" onclick="event.stopPropagation(); deleteWorkerDayWork(${worker.workerId}, '${currentModalDate}', '${worker.workerName}')" title="이 작업자의 해당 날짜 작업 전체 삭제">
+        🗑️
+      </button>
+    ` : '';
+
     return `
       <div class="worker-card ${statusClass}" onclick="openWorkerModal(${worker.workerId}, '${currentModalDate}')">
         <div class="worker-avatar">
@@ -618,6 +629,7 @@ async function renderModalDataFromSummary(workers, summary) {
           </div>
         </div>
         <div class="worker-actions">
+          ${deleteBtn}
           <button class="btn-work-entry" onclick="event.stopPropagation(); openWorkerModal(${worker.workerId}, '${currentModalDate}')" title="작업입력">
             작업입력
           </button>
@@ -813,6 +825,40 @@ function showToast(message, type = 'info') {
   }, 3000);
 }
 
+// 작업자의 해당 날짜 작업 전체 삭제 (관리자/그룹장용)
+async function deleteWorkerDayWork(workerId, date, workerName) {
+  // 확인 대화상자
+  const confirmed = confirm(
+    `⚠️ 정말로 삭제하시겠습니까?\n\n` +
+    `작업자: ${workerName}\n` +
+    `날짜: ${date}\n\n` +
+    `이 작업자의 해당 날짜 모든 작업이 삭제됩니다.\n` +
+    `삭제된 작업은 복구할 수 없습니다.`
+  );
+  
+  if (!confirmed) return;
+  
+  try {
+    showToast('작업을 삭제하는 중...', 'info');
+    
+    // 날짜+작업자별 전체 삭제 API 호출
+    const result = await window.apiCall(`/daily-work-reports/date/${date}/worker/${workerId}`, 'DELETE');
+    
+    console.log('✅ 작업 삭제 성공:', result);
+    showToast(`${workerName}의 ${date} 작업이 삭제되었습니다.`, 'success');
+    
+    // 모달 데이터 새로고침
+    await openDailyWorkModal(currentModalDate);
+    
+    // 캘린더도 새로고침
+    await loadCalendarData();
+    
+  } catch (error) {
+    console.error('❌ 작업 삭제 실패:', error);
+    showToast(`작업 삭제 실패: ${error.message}`, 'error');
+  }
+}
+
 // 작업자 개별 작업 모달 열기
 async function openWorkerModal(workerId, date) {
   try {
diff --git a/web-ui/css/daily-work-report.css b/web-ui/css/daily-work-report.css
index 86d7597..cba6e55 100644
--- a/web-ui/css/daily-work-report.css
+++ b/web-ui/css/daily-work-report.css
@@ -351,25 +351,33 @@
 }
 
 .remove-work-btn {
-  width: 40px;
-  height: 40px;
-  border-radius: var(--radius-full);
-  background: linear-gradient(135deg, var(--error-500), var(--error-600));
+  width: 36px;
+  height: 36px;
+  border-radius: 50%;
+  background: linear-gradient(135deg, #ef4444, #dc2626);
   color: white;
   border: none;
   cursor: pointer;
   display: flex;
   align-items: center;
   justify-content: center;
+  font-size: 18px;
+  font-weight: bold;
+  box-shadow: 0 2px 8px rgba(239, 68, 68, 0.4);
+  transition: all 0.2s ease;
   transition: var(--transition-normal);
   font-size: var(--text-lg);
   box-shadow: var(--shadow-sm);
 }
 
 .remove-work-btn:hover {
-  background: linear-gradient(135deg, var(--error-600), var(--error-700));
-  transform: scale(1.1) rotate(90deg);
-  box-shadow: var(--shadow-md);
+  background: linear-gradient(135deg, #dc2626, #b91c1c);
+  transform: scale(1.15);
+  box-shadow: 0 4px 12px rgba(239, 68, 68, 0.5);
+}
+
+.remove-work-btn:active {
+  transform: scale(0.95);
 }
 
 .work-entry-grid {
diff --git a/web-ui/css/work-report-calendar.css b/web-ui/css/work-report-calendar.css
index 14e34f0..8a69d83 100644
--- a/web-ui/css/work-report-calendar.css
+++ b/web-ui/css/work-report-calendar.css
@@ -664,6 +664,32 @@
   transform: scale(1.05);
 }
 
+/* 작업 삭제 버튼 (관리자/그룹장용) */
+.btn-delete-worker-work {
+  background: linear-gradient(135deg, #ef4444, #dc2626);
+  color: white;
+  border: none;
+  padding: 0.4rem 0.6rem;
+  border-radius: 0.5rem;
+  font-size: 0.875rem;
+  cursor: pointer;
+  transition: all 0.2s ease;
+  margin-right: 0.5rem;
+}
+
+.btn-delete-worker-work:hover {
+  background: linear-gradient(135deg, #dc2626, #b91c1c);
+  transform: scale(1.1);
+  box-shadow: 0 4px 12px rgba(239, 68, 68, 0.4);
+}
+
+/* 작업자 액션 버튼 컨테이너 */
+.worker-actions {
+  display: flex;
+  align-items: center;
+  gap: 0.5rem;
+}
+
 /* 캘린더 페이지 컨테이너 */
 .calendar-page-container {
   max-width: 1000px;
diff --git a/web-ui/js/daily-work-report.js b/web-ui/js/daily-work-report.js
index a551527..f9f13e2 100644
--- a/web-ui/js/daily-work-report.js
+++ b/web-ui/js/daily-work-report.js
@@ -334,8 +334,8 @@ function addWorkEntry() {
   entryDiv.innerHTML = `
     <div class="work-entry-header">
       <div class="work-entry-title">작업 항목 #${workEntryCounter}</div>
-      <button type="button" class="remove-work-btn" onclick="removeWorkEntry(${workEntryCounter})">
-        <i class="fas fa-times"></i>
+      <button type="button" class="remove-work-btn" onclick="removeWorkEntry(${workEntryCounter})" title="이 작업 삭제">
+        ✕
       </button>
     </div>
     
diff --git a/web-ui/js/work-report-calendar.js b/web-ui/js/work-report-calendar.js
index ef5f254..eacc3e3 100644
--- a/web-ui/js/work-report-calendar.js
+++ b/web-ui/js/work-report-calendar.js
@@ -591,6 +591,17 @@ async function renderModalDataFromSummary(workers, summary) {
     // 작업자 이름의 첫 글자 추출
     const initial = worker.workerName ? worker.workerName.charAt(0) : '?';
 
+    // 관리자/그룹장 권한 확인
+    const currentUser = JSON.parse(localStorage.getItem('user') || '{}');
+    const isAdmin = ['admin', 'system', 'group_leader'].includes(currentUser.access_level || currentUser.role);
+    
+    // 삭제 버튼 (관리자/그룹장만 표시, 작업이 있는 경우에만)
+    const deleteBtn = isAdmin && worker.totalWorkCount > 0 ? `
+      <button class="btn-delete-worker-work" onclick="event.stopPropagation(); deleteWorkerDayWork(${worker.workerId}, '${currentModalDate}', '${worker.workerName}')" title="이 작업자의 해당 날짜 작업 전체 삭제">
+        🗑️
+      </button>
+    ` : '';
+
     return `
       <div class="worker-card ${statusClass}" onclick="openWorkerModal(${worker.workerId}, '${currentModalDate}')">
         <div class="worker-avatar">
@@ -618,6 +629,7 @@ async function renderModalDataFromSummary(workers, summary) {
           </div>
         </div>
         <div class="worker-actions">
+          ${deleteBtn}
           <button class="btn-work-entry" onclick="event.stopPropagation(); openWorkerModal(${worker.workerId}, '${currentModalDate}')" title="작업입력">
             작업입력
           </button>
@@ -813,6 +825,40 @@ function showToast(message, type = 'info') {
   }, 3000);
 }
 
+// 작업자의 해당 날짜 작업 전체 삭제 (관리자/그룹장용)
+async function deleteWorkerDayWork(workerId, date, workerName) {
+  // 확인 대화상자
+  const confirmed = confirm(
+    `⚠️ 정말로 삭제하시겠습니까?\n\n` +
+    `작업자: ${workerName}\n` +
+    `날짜: ${date}\n\n` +
+    `이 작업자의 해당 날짜 모든 작업이 삭제됩니다.\n` +
+    `삭제된 작업은 복구할 수 없습니다.`
+  );
+  
+  if (!confirmed) return;
+  
+  try {
+    showToast('작업을 삭제하는 중...', 'info');
+    
+    // 날짜+작업자별 전체 삭제 API 호출
+    const result = await window.apiCall(`/daily-work-reports/date/${date}/worker/${workerId}`, 'DELETE');
+    
+    console.log('✅ 작업 삭제 성공:', result);
+    showToast(`${workerName}의 ${date} 작업이 삭제되었습니다.`, 'success');
+    
+    // 모달 데이터 새로고침
+    await openDailyWorkModal(currentModalDate);
+    
+    // 캘린더도 새로고침
+    await loadCalendarData();
+    
+  } catch (error) {
+    console.error('❌ 작업 삭제 실패:', error);
+    showToast(`작업 삭제 실패: ${error.message}`, 'error');
+  }
+}
+
 // 작업자 개별 작업 모달 열기
 async function openWorkerModal(workerId, date) {
   try {