diff --git a/src/com/pms/mapper/project.xml b/src/com/pms/mapper/project.xml
index f8d6dc3..78f3f2f 100644
--- a/src/com/pms/mapper/project.xml
+++ b/src/com/pms/mapper/project.xml
@@ -7627,29 +7627,65 @@ SELECT
 		<!-- //영업정보 수정시 프로젝트 정보 업데이트 -->
 	<update id="ModifyProjectByContract" parameterType="map">
 		UPDATE PROJECT_MGMT 
-		SET 
-			DUE_DATE				  = #{due_date}
-			,CUSTOMER_PROJECT_NAME	  = #{customer_project_name}
-			,LOCATION				  = #{location}
-			,SETUP					  = #{setup}
-			,FACILITY				  = #{facility}
-			,FACILITY_TYPE			  = #{facility_type}
-			,FACILITY_DEPTH			  = #{facility_depth}
-			,CONTRACT_DATE			  = #{contract_date}
-			,PO_NO					  = #{po_no}
-			,PM_USER_ID				  = #{pm_user_id}
-			,CONTRACT_CURRENCY		  = #{contract_currency}
-			,CONTRACT_PRICE_CURRENCY  = #{contract_price_currency}
-			,CONTRACT_PRICE			  = #{contract_price}
-			,PROJECT_NAME			  = #{project_name}
-			,CONTRACT_DEL_DATE		  = #{contract_del_date}
-			,REQ_DEL_DATE			  = #{req_del_date}
-			,CONTRACT_COMPANY		  = #{contract_company}
-			,MANUFACTURE_PLANT		  = #{manufacture_plant}
-			,PART_OBJID				  = #{part_objid}
-			,PART_NO				  = #{part_no}
-			,PART_NAME				  = #{part_name}
-			,QUANTITY				  = #{quantity}
+		<set>
+			<if test="due_date != null and due_date != ''">
+				DUE_DATE = #{due_date},
+			</if>
+			<if test="customer_project_name != null and customer_project_name != ''">
+				CUSTOMER_PROJECT_NAME = #{customer_project_name},
+			</if>
+			<if test="location != null and location != ''">
+				LOCATION = #{location},
+			</if>
+			<if test="setup != null and setup != ''">
+				SETUP = #{setup},
+			</if>
+			<if test="facility != null and facility != ''">
+				FACILITY = #{facility},
+			</if>
+			<if test="facility_type != null and facility_type != ''">
+				FACILITY_TYPE = #{facility_type},
+			</if>
+			<if test="facility_depth != null and facility_depth != ''">
+				FACILITY_DEPTH = #{facility_depth},
+			</if>
+			<if test="contract_date != null and contract_date != ''">
+				CONTRACT_DATE = #{contract_date},
+			</if>
+			<if test="po_no != null and po_no != ''">
+				PO_NO = #{po_no},
+			</if>
+			<if test="pm_user_id != null and pm_user_id != ''">
+				PM_USER_ID = #{pm_user_id},
+			</if>
+			<if test="contract_currency != null and contract_currency != ''">
+				CONTRACT_CURRENCY = #{contract_currency},
+			</if>
+			<if test="contract_price_currency != null and contract_price_currency != ''">
+				CONTRACT_PRICE_CURRENCY = #{contract_price_currency},
+			</if>
+			<if test="contract_price != null and contract_price != ''">
+				CONTRACT_PRICE = #{contract_price},
+			</if>
+			<if test="project_name != null and project_name != ''">
+				PROJECT_NAME = #{project_name},
+			</if>
+			<if test="contract_del_date != null and contract_del_date != ''">
+				CONTRACT_DEL_DATE = #{contract_del_date},
+			</if>
+			<if test="req_del_date != null and req_del_date != ''">
+				REQ_DEL_DATE = #{req_del_date},
+			</if>
+			<if test="contract_company != null and contract_company != ''">
+				CONTRACT_COMPANY = #{contract_company},
+			</if>
+			<if test="manufacture_plant != null and manufacture_plant != ''">
+				MANUFACTURE_PLANT = #{manufacture_plant},
+			</if>
+			<if test="quantity != null and quantity != ''">
+				QUANTITY = #{quantity}
+			</if>
+		</set>
 		WHERE CONTRACT_OBJID = #{objId}
 			AND PART_OBJID = #{part_objid}
 	</update>
diff --git a/src/com/pms/salesmgmt/service/ContractMgmtService.java b/src/com/pms/salesmgmt/service/ContractMgmtService.java
index 645850a..e99bcec 100644
--- a/src/com/pms/salesmgmt/service/ContractMgmtService.java
+++ b/src/com/pms/salesmgmt/service/ContractMgmtService.java
@@ -512,6 +512,35 @@ public class ContractMgmtService {
 			paramMap.put("writer", person.getUserId());
 			int cnt = sqlSession.update("contractMgmt.saveContractMgmtInfo", paramMap);
 		
+			// 프로젝트가 존재하는 경우 프로젝트 정보도 업데이트 (수량 제외)
+			String contract_objid = CommonUtils.checkNull(paramMap.get("objId"));
+			if(!"".equals(contract_objid)) {
+				// CONTRACT_OBJID로 프로젝트 존재 여부 확인
+				resultList = sqlSession.selectOne("contractMgmt.getProjectListBycontractObjid", paramMap);
+				
+				if(resultList != null) {
+					System.out.println("=== 견적요청 수정 시 프로젝트 업데이트 (수량 제외) ===");
+					System.out.println("CONTRACT_OBJID: " + contract_objid);
+					
+					// 품목별로 프로젝트 업데이트 (수량은 제외)
+					List<Map> contractItems = getContractItems(paramMap);
+					
+					if(contractItems != null && !contractItems.isEmpty()) {
+						for(Map item : contractItems) {
+							Map<String, Object> updateParam = new HashMap<String, Object>();
+							updateParam.putAll(paramMap);
+							updateParam.put("part_objid", item.get("PART_OBJID"));
+							updateParam.put("due_date", item.get("DUE_DATE"));
+							// quantity는 paramMap에서 제거하여 업데이트되지 않도록 함
+							updateParam.remove("quantity");
+							
+							System.out.println("프로젝트 업데이트 - PART_OBJID: " + item.get("PART_OBJID") + ", 납기일: " + updateParam.get("due_date"));
+							sqlSession.update("project.ModifyProjectByContract", updateParam);
+						}
+					}
+				}
+			}
+			
 			resultMap.put("result", true);
 			resultMap.put("msg", Message.SAVE_SUCCESS);
 			sqlSession.commit();