diff --git a/Project/Web/MachineBridge/MachineBridge.Board.cs b/Project/Web/MachineBridge/MachineBridge.Board.cs
index 86855ad..bda7759 100644
--- a/Project/Web/MachineBridge/MachineBridge.Board.cs
+++ b/Project/Web/MachineBridge/MachineBridge.Board.cs
@@ -154,5 +154,150 @@ namespace Project.Web
                 return JsonConvert.SerializeObject(new { Success = false, Message = ex.Message });
             }
         }
+
+        /// <summary>
+        /// 게시판 추가
+        /// </summary>
+        public string Board_Add(int bidx, string header, string cate, string title, string contents)
+        {
+            try
+            {
+                if (string.IsNullOrEmpty(info.Login.no) || string.IsNullOrEmpty(info.Login.gcode))
+                {
+                    return JsonConvert.SerializeObject(new { Success = false, Message = "로그인이 필요합니다." });
+                }
+
+                var connStr = Project.Properties.Settings.Default.CS;
+                using (var conn = new SqlConnection(connStr))
+                {
+                    conn.Open();
+
+                    var cmd = new SqlCommand(@"
+                        INSERT INTO Board (bidx, header, cate, title, contents, wuid, wdate, gcode)
+                        VALUES (@bidx, @header, @cate, @title, @contents, @wuid, GETDATE(), @gcode);
+                        SELECT SCOPE_IDENTITY();", conn);
+
+                    cmd.Parameters.Add("@bidx", SqlDbType.Int).Value = bidx;
+                    cmd.Parameters.Add("@header", SqlDbType.NVarChar).Value = string.IsNullOrEmpty(header) ? (object)DBNull.Value : header;
+                    cmd.Parameters.Add("@cate", SqlDbType.NVarChar).Value = string.IsNullOrEmpty(cate) ? (object)DBNull.Value : cate;
+                    cmd.Parameters.Add("@title", SqlDbType.NVarChar).Value = title;
+                    cmd.Parameters.Add("@contents", SqlDbType.NVarChar).Value = contents;
+                    cmd.Parameters.Add("@wuid", SqlDbType.VarChar).Value = info.Login.no;
+                    cmd.Parameters.Add("@gcode", SqlDbType.VarChar).Value = info.Login.gcode;
+
+                    var newIdx = Convert.ToInt32(cmd.ExecuteScalar());
+
+                    return JsonConvert.SerializeObject(new { Success = true, Message = "등록되었습니다.", Data = new { idx = newIdx } });
+                }
+            }
+            catch (Exception ex)
+            {
+                return JsonConvert.SerializeObject(new { Success = false, Message = ex.Message });
+            }
+        }
+
+        /// <summary>
+        /// 게시판 수정
+        /// </summary>
+        public string Board_Edit(int idx, string header, string cate, string title, string contents)
+        {
+            try
+            {
+                if (string.IsNullOrEmpty(info.Login.no) || string.IsNullOrEmpty(info.Login.gcode))
+                {
+                    return JsonConvert.SerializeObject(new { Success = false, Message = "로그인이 필요합니다." });
+                }
+
+                var connStr = Project.Properties.Settings.Default.CS;
+                using (var conn = new SqlConnection(connStr))
+                {
+                    conn.Open();
+
+                    // 권한 확인: 작성자 본인이거나 레벨 9 이상만 수정 가능
+                    var checkCmd = new SqlCommand("SELECT wuid FROM Board WHERE idx = @idx", conn);
+                    checkCmd.Parameters.Add("@idx", SqlDbType.Int).Value = idx;
+                    var originalWuid = checkCmd.ExecuteScalar()?.ToString();
+
+                    if (originalWuid != info.Login.no && info.Login.level < 9)
+                    {
+                        return JsonConvert.SerializeObject(new { Success = false, Message = "수정 권한이 없습니다." });
+                    }
+
+                    var cmd = new SqlCommand(@"
+                        UPDATE Board
+                        SET header = @header, cate = @cate, title = @title, contents = @contents
+                        WHERE idx = @idx", conn);
+
+                    cmd.Parameters.Add("@idx", SqlDbType.Int).Value = idx;
+                    cmd.Parameters.Add("@header", SqlDbType.NVarChar).Value = string.IsNullOrEmpty(header) ? (object)DBNull.Value : header;
+                    cmd.Parameters.Add("@cate", SqlDbType.NVarChar).Value = string.IsNullOrEmpty(cate) ? (object)DBNull.Value : cate;
+                    cmd.Parameters.Add("@title", SqlDbType.NVarChar).Value = title;
+                    cmd.Parameters.Add("@contents", SqlDbType.NVarChar).Value = contents;
+
+                    var affected = cmd.ExecuteNonQuery();
+
+                    if (affected > 0)
+                    {
+                        return JsonConvert.SerializeObject(new { Success = true, Message = "수정되었습니다." });
+                    }
+                    else
+                    {
+                        return JsonConvert.SerializeObject(new { Success = false, Message = "수정할 데이터를 찾을 수 없습니다." });
+                    }
+                }
+            }
+            catch (Exception ex)
+            {
+                return JsonConvert.SerializeObject(new { Success = false, Message = ex.Message });
+            }
+        }
+
+        /// <summary>
+        /// 게시판 삭제
+        /// </summary>
+        public string Board_Delete(int idx)
+        {
+            try
+            {
+                if (string.IsNullOrEmpty(info.Login.no) || string.IsNullOrEmpty(info.Login.gcode))
+                {
+                    return JsonConvert.SerializeObject(new { Success = false, Message = "로그인이 필요합니다." });
+                }
+
+                var connStr = Project.Properties.Settings.Default.CS;
+                using (var conn = new SqlConnection(connStr))
+                {
+                    conn.Open();
+
+                    // 권한 확인: 작성자 본인이거나 레벨 9 이상만 삭제 가능
+                    var checkCmd = new SqlCommand("SELECT wuid FROM Board WHERE idx = @idx", conn);
+                    checkCmd.Parameters.Add("@idx", SqlDbType.Int).Value = idx;
+                    var originalWuid = checkCmd.ExecuteScalar()?.ToString();
+
+                    if (originalWuid != info.Login.no && info.Login.level < 9)
+                    {
+                        return JsonConvert.SerializeObject(new { Success = false, Message = "삭제 권한이 없습니다." });
+                    }
+
+                    var cmd = new SqlCommand("DELETE FROM Board WHERE idx = @idx", conn);
+                    cmd.Parameters.Add("@idx", SqlDbType.Int).Value = idx;
+
+                    var affected = cmd.ExecuteNonQuery();
+
+                    if (affected > 0)
+                    {
+                        return JsonConvert.SerializeObject(new { Success = true, Message = "삭제되었습니다." });
+                    }
+                    else
+                    {
+                        return JsonConvert.SerializeObject(new { Success = false, Message = "삭제할 데이터를 찾을 수 없습니다." });
+                    }
+                }
+            }
+            catch (Exception ex)
+            {
+                return JsonConvert.SerializeObject(new { Success = false, Message = ex.Message });
+            }
+        }
     }
 }
diff --git a/Project/Web/MachineBridge/WebSocketServer.cs b/Project/Web/MachineBridge/WebSocketServer.cs
index 892650d..c96e3b2 100644
--- a/Project/Web/MachineBridge/WebSocketServer.cs
+++ b/Project/Web/MachineBridge/WebSocketServer.cs
@@ -917,6 +917,41 @@ namespace Project.Web
                         }
                         break;
 
+                    case "BOARD_ADD":
+                        {
+                            int bidx = json.bidx ?? 5;
+                            string header = json.header ?? "";
+                            string cate = json.cate ?? "";
+                            string title = json.title ?? "";
+                            string contents = json.contents ?? "";
+                            string result = _bridge.Board_Add(bidx, header, cate, title, contents);
+                            var response = new { type = "BOARD_ADDED", data = JsonConvert.DeserializeObject(result) };
+                            await Send(socket, JsonConvert.SerializeObject(response));
+                        }
+                        break;
+
+                    case "BOARD_EDIT":
+                        {
+                            int idx = json.idx ?? 0;
+                            string header = json.header ?? "";
+                            string cate = json.cate ?? "";
+                            string title = json.title ?? "";
+                            string contents = json.contents ?? "";
+                            string result = _bridge.Board_Edit(idx, header, cate, title, contents);
+                            var response = new { type = "BOARD_EDITED", data = JsonConvert.DeserializeObject(result) };
+                            await Send(socket, JsonConvert.SerializeObject(response));
+                        }
+                        break;
+
+                    case "BOARD_DELETE":
+                        {
+                            int idx = json.idx ?? 0;
+                            string result = _bridge.Board_Delete(idx);
+                            var response = new { type = "BOARD_DELETED", data = JsonConvert.DeserializeObject(result) };
+                            await Send(socket, JsonConvert.SerializeObject(response));
+                        }
+                        break;
+
                     // ===== Mail API (메일 발신 내역) =====
                     case "MAIL_GET_LIST":
                         {
diff --git a/Project/frontend/src/communication.ts b/Project/frontend/src/communication.ts
index 66cdabf..c245152 100644
--- a/Project/frontend/src/communication.ts
+++ b/Project/frontend/src/communication.ts
@@ -1264,6 +1264,56 @@ class CommunicationLayer {
     }
   }
 
+  /**
+   * 게시판 추가
+   * @param bidx 게시판 인덱스
+   * @param header 헤더
+   * @param cate 카테고리
+   * @param title 제목
+   * @param contents 내용
+   * @returns ApiResponse
+   */
+  public async addBoard(bidx: number, header: string, cate: string, title: string, contents: string): Promise<ApiResponse> {
+    if (isWebView && machine) {
+      const result = await machine.Board_Add(bidx, header, cate, title, contents);
+      return JSON.parse(result);
+    } else {
+      return this.wsRequest<ApiResponse>('BOARD_ADD', 'BOARD_ADDED', { bidx, header, cate, title, contents });
+    }
+  }
+
+  /**
+   * 게시판 수정
+   * @param idx 게시판 글 인덱스
+   * @param header 헤더
+   * @param cate 카테고리
+   * @param title 제목
+   * @param contents 내용
+   * @returns ApiResponse
+   */
+  public async editBoard(idx: number, header: string, cate: string, title: string, contents: string): Promise<ApiResponse> {
+    if (isWebView && machine) {
+      const result = await machine.Board_Edit(idx, header, cate, title, contents);
+      return JSON.parse(result);
+    } else {
+      return this.wsRequest<ApiResponse>('BOARD_EDIT', 'BOARD_EDITED', { idx, header, cate, title, contents });
+    }
+  }
+
+  /**
+   * 게시판 삭제
+   * @param idx 게시판 글 인덱스
+   * @returns ApiResponse
+   */
+  public async deleteBoard(idx: number): Promise<ApiResponse> {
+    if (isWebView && machine) {
+      const result = await machine.Board_Delete(idx);
+      return JSON.parse(result);
+    } else {
+      return this.wsRequest<ApiResponse>('BOARD_DELETE', 'BOARD_DELETED', { idx });
+    }
+  }
+
   /**
    * 메일 발신 내역 조회
    * @param startDate 시작일 (yyyy-MM-dd)
diff --git a/Project/frontend/src/pages/PatchList.tsx b/Project/frontend/src/pages/PatchList.tsx
index 4abfa9e..cfbfd2b 100644
--- a/Project/frontend/src/pages/PatchList.tsx
+++ b/Project/frontend/src/pages/PatchList.tsx
@@ -87,15 +87,73 @@ export function PatchList() {
     if (!editFormData) return;
 
     try {
-      // TODO: Board_Edit API 구현 필요
-      alert('게시판 수정 API가 아직 구현되지 않았습니다.');
-      console.log('수정할 데이터:', editFormData);
+      const isNew = editFormData.idx === 0;
+      
+      if (isNew) {
+        // 신규 등록
+        const response = await comms.addBoard(
+          5, // bidx: 패치내역
+          editFormData.header || '',
+          editFormData.cate || '',
+          editFormData.title || '',
+          editFormData.contents || ''
+        );
+        
+        if (response.Success) {
+          alert('등록되었습니다.');
+          setShowEditModal(false);
+          setEditFormData(null);
+          loadData();
+        } else {
+          alert(response.Message || '등록에 실패했습니다.');
+        }
+      } else {
+        // 수정
+        const response = await comms.editBoard(
+          editFormData.idx,
+          editFormData.header || '',
+          editFormData.cate || '',
+          editFormData.title || '',
+          editFormData.contents || ''
+        );
+        
+        if (response.Success) {
+          alert('수정되었습니다.');
+          setShowEditModal(false);
+          setEditFormData(null);
+          loadData();
+        } else {
+          alert(response.Message || '수정에 실패했습니다.');
+        }
+      }
     } catch (error) {
       console.error('저장 오류:', error);
       alert('저장 중 오류가 발생했습니다.');
     }
   };
 
+  const handleDelete = async () => {
+    if (!editFormData || editFormData.idx === 0) return;
+
+    if (!confirm('정말 삭제하시겠습니까?')) return;
+
+    try {
+      const response = await comms.deleteBoard(editFormData.idx);
+      
+      if (response.Success) {
+        alert('삭제되었습니다.');
+        setShowEditModal(false);
+        setEditFormData(null);
+        loadData();
+      } else {
+        alert(response.Message || '삭제에 실패했습니다.');
+      }
+    } catch (error) {
+      console.error('삭제 오류:', error);
+      alert('삭제 중 오류가 발생했습니다.');
+    }
+  };
+
   const formatDate = (dateStr: string | null) => {
     if (!dateStr) return '-';
     try {
@@ -359,19 +417,31 @@ export function PatchList() {
               </div>
             </div>
 
-            <div className="flex items-center justify-end gap-2 px-6 py-4 border-t border-white/10 bg-white/5">
-              <button
-                onClick={() => setShowEditModal(false)}
-                className="px-4 py-2 rounded-lg bg-white/10 hover:bg-white/20 text-white transition-colors"
-              >
-                취소
-              </button>
-              <button
-                onClick={handleEditSave}
-                className="px-4 py-2 rounded-lg bg-primary-500 hover:bg-primary-600 text-white transition-colors"
-              >
-                저장
-              </button>
+            <div className="flex items-center justify-between px-6 py-4 border-t border-white/10 bg-white/5">
+              <div>
+                {editFormData && editFormData.idx > 0 && (
+                  <button
+                    onClick={handleDelete}
+                    className="px-4 py-2 rounded-lg bg-red-500 hover:bg-red-600 text-white transition-colors"
+                  >
+                    삭제
+                  </button>
+                )}
+              </div>
+              <div className="flex items-center gap-2">
+                <button
+                  onClick={() => setShowEditModal(false)}
+                  className="px-4 py-2 rounded-lg bg-white/10 hover:bg-white/20 text-white transition-colors"
+                >
+                  취소
+                </button>
+                <button
+                  onClick={handleEditSave}
+                  className="px-4 py-2 rounded-lg bg-primary-500 hover:bg-primary-600 text-white transition-colors"
+                >
+                  저장
+                </button>
+              </div>
             </div>
           </div>
         </div>
diff --git a/Project/frontend/src/types.ts b/Project/frontend/src/types.ts
index 6f327d7..f3707b1 100644
--- a/Project/frontend/src/types.ts
+++ b/Project/frontend/src/types.ts
@@ -459,6 +459,9 @@ export interface MachineBridgeInterface {
   // Board API (게시판 - 패치내역 등)
   Board_GetList(bidx: number, searchKey: string): Promise<string>;
   Board_GetDetail(idx: number): Promise<string>;
+  Board_Add(bidx: number, header: string, cate: string, title: string, contents: string): Promise<string>;
+  Board_Edit(idx: number, header: string, cate: string, title: string, contents: string): Promise<string>;
+  Board_Delete(idx: number): Promise<string>;
 
   // Mail API (메일 발신 내역)
   Mail_GetList(startDate: string, endDate: string, searchKey: string): Promise<string>;