diff --git a/src/components/approval/ApprovalBox/actions.ts b/src/components/approval/ApprovalBox/actions.ts
index 17b2a1a8..711a4944 100644
--- a/src/components/approval/ApprovalBox/actions.ts
+++ b/src/components/approval/ApprovalBox/actions.ts
@@ -70,7 +70,7 @@ function mapTabToApiStatus(tabStatus: string): string | undefined {
 
 function mapApprovalType(formCategory?: string): ApprovalType {
   const typeMap: Record<string, ApprovalType> = {
-    'expense_report': 'expense_report', 'proposal': 'proposal', 'expense_estimate': 'expense_estimate',
+    'expense_report': 'expense_report', 'proposal': 'proposal', 'expense_estimate': 'expense_estimate', '문서': 'document', 'document': 'document',
   };
   return typeMap[formCategory || ''] || 'proposal';
 }
@@ -176,6 +176,127 @@ export async function approveDocumentsBulk(ids: string[], comment?: string): Pro
   return { success: true };
 }
 
+// ============================================
+// 연결 문서(Document) 조회
+// ============================================
+
+interface LinkedDocumentApiData {
+  id: number;
+  document_number: string;
+  title: string;
+  status: string;
+  drafter?: {
+    id: number; name: string; position?: string;
+    department?: { name: string };
+    tenant_profile?: { position_key?: string; department?: { name: string } };
+  };
+  steps?: InboxStepApiData[];
+  linkable?: {
+    id: number;
+    title: string;
+    document_no: string;
+    status: string;
+    created_at: string;
+    linkable_type?: string;
+    linkable_id?: number;
+    template?: { id: number; name: string; code: string };
+    data?: Array<{ id: number; field_key: string; field_label?: string; field_value?: unknown; value?: unknown }>;
+    approvals?: Array<{ id: number; step: number; status: string; acted_at?: string; user?: { id: number; name: string } }>;
+    attachments?: Array<{ id: number; display_name: string; file_path: string }>;
+  };
+}
+
+interface LinkedDocumentResult {
+  documentNo: string;
+  createdAt: string;
+  title: string;
+  templateName: string;
+  templateCode: string;
+  status: string;
+  workOrderId?: number;
+  documentData: Array<{ fieldKey: string; fieldLabel: string; value: unknown }>;
+  approvers: Array<{ id: string; name: string; position: string; department: string; status: 'pending' | 'approved' | 'rejected' | 'none' }>;
+  drafter: { id: string; name: string; position: string; department: string; status: 'approved' | 'pending' | 'rejected' | 'none' };
+  attachments?: Array<{ id: number; name: string; url: string }>;
+}
+
+function getPositionLabel(positionKey: string | null | undefined): string {
+  if (!positionKey) return '';
+  const labels: Record<string, string> = {
+    'EXECUTIVE': '임원', 'DIRECTOR': '부장', 'MANAGER': '과장',
+    'SENIOR': '대리', 'STAFF': '사원', 'INTERN': '인턴',
+  };
+  return labels[positionKey] ?? positionKey;
+}
+
+export async function getDocumentApprovalById(id: number): Promise<{
+  success: boolean;
+  data?: LinkedDocumentResult;
+  error?: string;
+}> {
+  // eslint-disable-next-line @typescript-eslint/no-explicit-any
+  const result = await executeServerAction<any>({
+    url: buildApiUrl(`/api/v1/approvals/${id}`),
+    errorMessage: '문서 조회에 실패했습니다.',
+  });
+  if (!result.success || !result.data) return { success: false, error: result.error };
+
+  const apiData = result.data as LinkedDocumentApiData;
+  const linkable = apiData.linkable;
+
+  const drafter = {
+    id: String(apiData.drafter?.id || ''),
+    name: apiData.drafter?.name || '',
+    position: apiData.drafter?.tenant_profile?.position_key
+      ? getPositionLabel(apiData.drafter.tenant_profile.position_key)
+      : (apiData.drafter?.position || ''),
+    department: apiData.drafter?.tenant_profile?.department?.name
+      || apiData.drafter?.department?.name || '',
+    status: 'approved' as const,
+  };
+
+  const approvers = (apiData.steps || [])
+    .filter(s => s.step_type === 'approval' || s.step_type === 'agreement')
+    .map(step => ({
+      id: String(step.approver?.id || step.approver_id),
+      name: step.approver?.name || '',
+      position: step.approver?.position || '',
+      department: step.approver?.department?.name || '',
+      status: (step.status === 'approved' ? 'approved'
+        : step.status === 'rejected' ? 'rejected'
+        : step.status === 'pending' ? 'pending'
+        : 'none') as 'pending' | 'approved' | 'rejected' | 'none',
+    }));
+
+  // work_order 연결 문서인 경우 workOrderId 추출
+  const workOrderId = linkable?.linkable_type === 'work_order' ? linkable.linkable_id : undefined;
+
+  return {
+    success: true,
+    data: {
+      documentNo: linkable?.document_no || apiData.document_number,
+      createdAt: linkable?.created_at || '',
+      title: linkable?.title || apiData.title,
+      templateName: linkable?.template?.name || '',
+      templateCode: linkable?.template?.code || '',
+      status: linkable?.status || apiData.status,
+      workOrderId,
+      documentData: (linkable?.data || []).map(d => ({
+        fieldKey: d.field_key,
+        fieldLabel: d.field_label || d.field_key,
+        value: d.field_value ?? d.value,
+      })),
+      approvers,
+      drafter,
+      attachments: (linkable?.attachments || []).map(a => ({
+        id: a.id,
+        name: a.display_name,
+        url: `/api/proxy/files/${a.id}/download`,
+      })),
+    },
+  };
+}
+
 export async function rejectDocumentsBulk(ids: string[], comment: string): Promise<{ success: boolean; failedIds?: string[]; error?: string }> {
   if (!comment?.trim()) return { success: false, error: '반려 사유를 입력해주세요.' };
   const failedIds: string[] = [];
diff --git a/src/components/approval/ApprovalBox/index.tsx b/src/components/approval/ApprovalBox/index.tsx
index 98b5d8af..4139f0ab 100644
--- a/src/components/approval/ApprovalBox/index.tsx
+++ b/src/components/approval/ApprovalBox/index.tsx
@@ -19,6 +19,7 @@ import {
   rejectDocument,
   approveDocumentsBulk,
   rejectDocumentsBulk,
+  getDocumentApprovalById,
 } from './actions';
 import { getApprovalById } from '@/components/approval/DocumentCreate/actions';
 import { Button } from '@/components/ui/button';
@@ -58,6 +59,7 @@ import type {
   ProposalDocumentData,
   ExpenseReportDocumentData,
   ExpenseEstimateDocumentData,
+  LinkedDocumentData,
 } from '@/components/approval/DocumentDetail/types';
 import type {
   ApprovalTabType,
@@ -76,6 +78,7 @@ import {
 } from './types';
 import { isNextRedirectError } from '@/lib/utils/redirect-error';
 import { usePermission } from '@/hooks/usePermission';
+import { InspectionReportModal } from '@/components/production/WorkOrders/documents/InspectionReportModal';
 
 // ===== 통계 타입 =====
 interface InboxSummary {
@@ -111,9 +114,13 @@ export function ApprovalBox() {
   // ===== 문서 상세 모달 상태 =====
   const [isModalOpen, setIsModalOpen] = useState(false);
   const [selectedDocument, setSelectedDocument] = useState<ApprovalRecord | null>(null);
-  const [modalData, setModalData] = useState<ProposalDocumentData | ExpenseReportDocumentData | ExpenseEstimateDocumentData | null>(null);
+  const [modalData, setModalData] = useState<ProposalDocumentData | ExpenseReportDocumentData | ExpenseEstimateDocumentData | LinkedDocumentData | null>(null);
   const [isModalLoading, setIsModalLoading] = useState(false);
 
+  // ===== 검사성적서 모달 상태 (work_order 연결 문서용) =====
+  const [isInspectionModalOpen, setIsInspectionModalOpen] = useState(false);
+  const [inspectionWorkOrderId, setInspectionWorkOrderId] = useState<string | null>(null);
+
   // API 데이터
   const [data, setData] = useState<ApprovalRecord[]>([]);
   const [totalCount, setTotalCount] = useState(0);
@@ -288,6 +295,27 @@ export function ApprovalBox() {
     setIsModalOpen(true);
 
     try {
+      // 문서 결재(document) 타입은 별도 API로 연결 문서 데이터 조회
+      if (item.approvalType === 'document') {
+        const result = await getDocumentApprovalById(parseInt(item.id));
+        if (result.success && result.data) {
+          // work_order 연결 문서 → InspectionReportModal로 열기
+          if (result.data.workOrderId) {
+            setIsModalOpen(false);
+            setIsModalLoading(false);
+            setInspectionWorkOrderId(String(result.data.workOrderId));
+            setIsInspectionModalOpen(true);
+            return;
+          }
+          setModalData(result.data as LinkedDocumentData);
+        } else {
+          toast.error(result.error || '문서 조회에 실패했습니다.');
+          setIsModalOpen(false);
+        }
+        return;
+      }
+
+      // 기존 결재 문서 타입 (품의서, 지출결의서, 지출예상내역서)
       const result = await getApprovalById(parseInt(item.id));
       if (result.success && result.data) {
         const formData = result.data;
@@ -439,6 +467,8 @@ export function ApprovalBox() {
         return 'expenseEstimate';
       case 'expense_report':
         return 'expenseReport';
+      case 'document':
+        return 'document';
       default:
         return 'proposal';
     }
@@ -796,6 +826,19 @@ export function ApprovalBox() {
               onReject={canApprove ? handleModalReject : undefined}
             />
           )}
+
+          {/* 검사성적서 모달 (work_order 연결 문서) */}
+          <InspectionReportModal
+            open={isInspectionModalOpen}
+            onOpenChange={(open) => {
+              setIsInspectionModalOpen(open);
+              if (!open) {
+                setInspectionWorkOrderId(null);
+              }
+            }}
+            workOrderId={inspectionWorkOrderId}
+            readOnly={true}
+          />
         </>
       ),
     }),
@@ -827,6 +870,8 @@ export function ApprovalBox() {
       handleModalApprove,
       handleModalReject,
       canApprove,
+      isInspectionModalOpen,
+      inspectionWorkOrderId,
     ]
   );
 
diff --git a/src/components/approval/ApprovalBox/types.ts b/src/components/approval/ApprovalBox/types.ts
index c0c545c4..ca67d7ba 100644
--- a/src/components/approval/ApprovalBox/types.ts
+++ b/src/components/approval/ApprovalBox/types.ts
@@ -9,17 +9,18 @@ export type ApprovalTabType = 'all' | 'pending' | 'approved' | 'rejected';
 // 결재 상태
 export type ApprovalStatus = 'pending' | 'approved' | 'rejected';
 
-// 결재 유형 (문서 종류): 지출결의서, 품의서, 지출예상내역서
-export type ApprovalType = 'expense_report' | 'proposal' | 'expense_estimate';
+// 결재 유형 (문서 종류): 지출결의서, 품의서, 지출예상내역서, 문서결재
+export type ApprovalType = 'expense_report' | 'proposal' | 'expense_estimate' | 'document';
 
 // 필터 옵션
-export type FilterOption = 'all' | 'expense_report' | 'proposal' | 'expense_estimate';
+export type FilterOption = 'all' | 'expense_report' | 'proposal' | 'expense_estimate' | 'document';
 
 export const FILTER_OPTIONS: { value: FilterOption; label: string }[] = [
   { value: 'all', label: '전체' },
   { value: 'expense_report', label: '지출결의서' },
   { value: 'proposal', label: '품의서' },
   { value: 'expense_estimate', label: '지출예상내역서' },
+  { value: 'document', label: '문서 결재' },
 ];
 
 // 정렬 옵션
@@ -71,12 +72,14 @@ export const APPROVAL_TYPE_LABELS: Record<ApprovalType, string> = {
   expense_report: '지출결의서',
   proposal: '품의서',
   expense_estimate: '지출예상내역서',
+  document: '문서 결재',
 };
 
 export const APPROVAL_TYPE_COLORS: Record<ApprovalType, string> = {
   expense_report: 'blue',
   proposal: 'green',
   expense_estimate: 'purple',
+  document: 'orange',
 };
 
 export const APPROVAL_STATUS_LABELS: Record<ApprovalStatus, string> = {
diff --git a/src/components/approval/DocumentDetail/DocumentDetailModalV2.tsx b/src/components/approval/DocumentDetail/DocumentDetailModalV2.tsx
index 6c1c2a66..ae49943e 100644
--- a/src/components/approval/DocumentDetail/DocumentDetailModalV2.tsx
+++ b/src/components/approval/DocumentDetail/DocumentDetailModalV2.tsx
@@ -4,12 +4,14 @@ import { DocumentViewer } from '@/components/document-system';
 import { ProposalDocument } from './ProposalDocument';
 import { ExpenseReportDocument } from './ExpenseReportDocument';
 import { ExpenseEstimateDocument } from './ExpenseEstimateDocument';
+import { LinkedDocumentContent } from './LinkedDocumentContent';
 import type {
   DocumentType,
   DocumentDetailModalProps,
   ProposalDocumentData,
   ExpenseReportDocumentData,
   ExpenseEstimateDocumentData,
+  LinkedDocumentData,
 } from './types';
 
 /**
@@ -41,6 +43,8 @@ export function DocumentDetailModalV2({
         return '지출결의서';
       case 'expenseEstimate':
         return '지출 예상 내역서';
+      case 'document':
+        return (data as LinkedDocumentData).templateName || '문서 결재';
       default:
         return '문서';
     }
@@ -69,6 +73,8 @@ export function DocumentDetailModalV2({
         return <ExpenseReportDocument data={data as ExpenseReportDocumentData} />;
       case 'expenseEstimate':
         return <ExpenseEstimateDocument data={data as ExpenseEstimateDocumentData} />;
+      case 'document':
+        return <LinkedDocumentContent data={data as LinkedDocumentData} />;
       default:
         return null;
     }
diff --git a/src/components/approval/DocumentDetail/LinkedDocumentContent.tsx b/src/components/approval/DocumentDetail/LinkedDocumentContent.tsx
new file mode 100644
index 00000000..0e89e1cc
--- /dev/null
+++ b/src/components/approval/DocumentDetail/LinkedDocumentContent.tsx
@@ -0,0 +1,133 @@
+'use client';
+
+/**
+ * 연결 문서 콘텐츠 컴포넌트
+ *
+ * 문서관리에서 생성된 검사 성적서, 작업일지 등을
+ * 결재함 모달에서 렌더링합니다.
+ */
+
+import { ApprovalLineBox } from './ApprovalLineBox';
+import type { LinkedDocumentData } from './types';
+import { DocumentHeader } from '@/components/document-system';
+import { Badge } from '@/components/ui/badge';
+import { FileText, Paperclip } from 'lucide-react';
+
+interface LinkedDocumentContentProps {
+  data: LinkedDocumentData;
+}
+
+const STATUS_LABELS: Record<string, string> = {
+  DRAFT: '임시저장',
+  PENDING: '진행중',
+  APPROVED: '승인완료',
+  REJECTED: '반려',
+  CANCELLED: '회수',
+};
+
+const STATUS_COLORS: Record<string, string> = {
+  DRAFT: 'bg-gray-100 text-gray-800',
+  PENDING: 'bg-yellow-100 text-yellow-800',
+  APPROVED: 'bg-green-100 text-green-800',
+  REJECTED: 'bg-red-100 text-red-800',
+  CANCELLED: 'bg-gray-100 text-gray-600',
+};
+
+export function LinkedDocumentContent({ data }: LinkedDocumentContentProps) {
+  return (
+    <div className="bg-white p-8 min-h-full">
+      {/* 문서 헤더 (공통 컴포넌트) */}
+      <DocumentHeader
+        title={data.templateName || '문서 결재'}
+        subtitle={`문서번호: ${data.documentNo} | 작성일자: ${data.createdAt?.substring(0, 10) || '-'}`}
+        layout="centered"
+        customApproval={<ApprovalLineBox drafter={data.drafter} approvers={data.approvers} />}
+      />
+
+      {/* 문서 기본 정보 */}
+      <div className="border border-gray-300 mb-4">
+        <div className="flex border-b border-gray-300">
+          <div className="w-28 bg-gray-100 p-3 font-medium text-sm border-r border-gray-300">
+            문서 제목
+          </div>
+          <div className="flex-1 p-3 text-sm">{data.title || '-'}</div>
+        </div>
+        <div className="grid grid-cols-2 border-b border-gray-300">
+          <div className="flex border-r border-gray-300">
+            <div className="w-28 bg-gray-100 p-3 font-medium text-sm border-r border-gray-300">
+              양식
+            </div>
+            <div className="flex-1 p-3 text-sm flex items-center gap-2">
+              <FileText className="w-4 h-4 text-gray-500" />
+              {data.templateName || '-'}
+            </div>
+          </div>
+          <div className="flex">
+            <div className="w-28 bg-gray-100 p-3 font-medium text-sm border-r border-gray-300">
+              상태
+            </div>
+            <div className="flex-1 p-3 text-sm">
+              <Badge className={STATUS_COLORS[data.status] || 'bg-gray-100 text-gray-800'}>
+                {STATUS_LABELS[data.status] || data.status}
+              </Badge>
+            </div>
+          </div>
+        </div>
+      </div>
+
+      {/* 문서 데이터 */}
+      {data.documentData.length > 0 && (
+        <div className="border border-gray-300 mb-4">
+          <div className="bg-gray-800 text-white p-2 text-sm font-medium text-center">
+            문서 내용
+          </div>
+          <div className="divide-y divide-gray-300">
+            {data.documentData.map((field, index) => (
+              <div key={index} className="flex">
+                <div className="w-36 bg-gray-100 p-3 font-medium text-sm border-r border-gray-300">
+                  {field.fieldLabel}
+                </div>
+                <div className="flex-1 p-3 text-sm whitespace-pre-wrap">
+                  {renderFieldValue(field.value)}
+                </div>
+              </div>
+            ))}
+          </div>
+        </div>
+      )}
+
+      {/* 첨부파일 */}
+      {data.attachments && data.attachments.length > 0 && (
+        <div className="border border-gray-300">
+          <div className="bg-gray-800 text-white p-2 text-sm font-medium text-center">
+            첨부파일
+          </div>
+          <div className="p-4 space-y-2">
+            {data.attachments.map((file) => (
+              <a
+                key={file.id}
+                href={file.url}
+                target="_blank"
+                rel="noopener noreferrer"
+                className="flex items-center gap-2 text-sm text-blue-600 hover:underline"
+              >
+                <Paperclip className="w-4 h-4" />
+                {file.name}
+              </a>
+            ))}
+          </div>
+        </div>
+      )}
+    </div>
+  );
+}
+
+function renderFieldValue(value: unknown): string {
+  if (value === null || value === undefined) return '-';
+  if (typeof value === 'string') return value || '-';
+  if (typeof value === 'number') return String(value);
+  if (typeof value === 'boolean') return value ? '예' : '아니오';
+  if (Array.isArray(value)) return value.join(', ') || '-';
+  if (typeof value === 'object') return JSON.stringify(value, null, 2);
+  return String(value);
+}
diff --git a/src/components/approval/DocumentDetail/types.ts b/src/components/approval/DocumentDetail/types.ts
index 1ff24588..7a7b2cb7 100644
--- a/src/components/approval/DocumentDetail/types.ts
+++ b/src/components/approval/DocumentDetail/types.ts
@@ -1,6 +1,6 @@
 // ===== 문서 상세 모달 타입 정의 =====
 
-export type DocumentType = 'proposal' | 'expenseReport' | 'expenseEstimate';
+export type DocumentType = 'proposal' | 'expenseReport' | 'expenseEstimate' | 'document';
 
 // 결재자 정보
 export interface Approver {
@@ -72,6 +72,29 @@ export interface ExpenseEstimateDocumentData {
   drafter: Approver;
 }
 
+// 연결 문서 데이터 (검사 성적서, 작업일지 등 문서관리에서 생성된 문서)
+export interface LinkedDocumentData {
+  documentNo: string;
+  createdAt: string;
+  title: string;
+  templateName: string;
+  templateCode: string;
+  status: string;
+  workOrderId?: number;
+  documentData: Array<{
+    fieldKey: string;
+    fieldLabel: string;
+    value: unknown;
+  }>;
+  approvers: Approver[];
+  drafter: Approver;
+  attachments?: Array<{
+    id: number;
+    name: string;
+    url: string;
+  }>;
+}
+
 // 문서 상세 모달 모드
 export type DocumentDetailMode = 'draft' | 'inbox' | 'reference';
 
@@ -83,7 +106,7 @@ export interface DocumentDetailModalProps {
   open: boolean;
   onOpenChange: (open: boolean) => void;
   documentType: DocumentType;
-  data: ProposalDocumentData | ExpenseReportDocumentData | ExpenseEstimateDocumentData;
+  data: ProposalDocumentData | ExpenseReportDocumentData | ExpenseEstimateDocumentData | LinkedDocumentData;
   mode?: DocumentDetailMode; // 'draft': 기안함 (상신), 'inbox': 결재함 (승인/반려)
   documentStatus?: DocumentStatus; // 문서 상태 (임시저장일 때만 수정/상신 가능)
   onEdit?: () => void;