diff --git a/src/main/java/com/kospo/svcm/controller/ApprController.java b/src/main/java/com/kospo/svcm/controller/ApprController.java
index 9f6a18a..9878b7d 100644
--- a/src/main/java/com/kospo/svcm/controller/ApprController.java
+++ b/src/main/java/com/kospo/svcm/controller/ApprController.java
@@ -25,6 +25,7 @@ import org.springframework.http.ResponseEntity;
 import org.springframework.web.bind.annotation.*;
 
 import java.security.Principal;
+import java.util.HashMap;
 import java.util.List;
 
 @Tag(name = "Approval Api", description = "결재 관리")
@@ -55,6 +56,26 @@ public class ApprController {
         return ResponseEntity.ok(apprService.findByPrcsNo(prcsNo));
     }
 
+
+    @Operation(summary = "결재번호를 가격조사 번호로 변경", description = "결재번호 To 가격조사번호")
+    @ApiResponses({
+            @ApiResponse(description = "Success", responseCode = "200",
+                    content = @Content(mediaType = "application/json",
+                            schema = @Schema(oneOf =
+                                    {HashMap.class}))),
+            @ApiResponse(description = "Not found", responseCode = "404",
+                    content = @Content(mediaType = "text/plain", schema = @Schema(oneOf =
+                            {String.class}))),
+            @ApiResponse(description = "Internal Error", responseCode = "500",
+                    content = @Content(mediaType = "application/json", schema = @Schema(oneOf =
+                            {CustomErrorResponse.class })))
+    })
+    @GetMapping("/appr/conveter/{apprNo}")
+    public ResponseEntity apprNoToPrcsNo(
+            @Parameter(description = "결재번호") @PathVariable(required = false) String apprNo
+    ) {
+        return ResponseEntity.ok(apprService.apprNoToPrcsNo(apprNo));
+    }
 //    @Operation(summary = "본인 결재목록 조회", description = "가격조사 결재 조회")
 //    @ApiResponses({
 //            @ApiResponse(description = "Success", responseCode = "200",
diff --git a/src/main/java/com/kospo/svcm/controller/PrcsController.java b/src/main/java/com/kospo/svcm/controller/PrcsController.java
index 252d304..1502174 100644
--- a/src/main/java/com/kospo/svcm/controller/PrcsController.java
+++ b/src/main/java/com/kospo/svcm/controller/PrcsController.java
@@ -28,6 +28,7 @@ import org.yaml.snakeyaml.util.UriEncoder;
 import java.io.IOException;
 import java.net.MalformedURLException;
 import java.security.Principal;
+import java.util.HashMap;
 
 @Tag(name = "PriceSurvey Api", description = "가격조사 관리")
 @RestController
diff --git a/src/main/java/com/kospo/svcm/service/ApprService.java b/src/main/java/com/kospo/svcm/service/ApprService.java
index 780996e..7a115d1 100644
--- a/src/main/java/com/kospo/svcm/service/ApprService.java
+++ b/src/main/java/com/kospo/svcm/service/ApprService.java
@@ -9,11 +9,15 @@ import jakarta.transaction.Transactional;
 import org.springframework.data.domain.Page;
 import org.springframework.data.domain.Pageable;
 
+import java.util.HashMap;
 import java.util.List;
 
 public interface ApprService {
     ApprMstResponse findByPrcsNo(String prcsNo);
 
+    @Transactional
+    HashMap apprNoToPrcsNo(String apprNo);
+
     PageResponse findByApprBySabun(String sabun, Pageable pageable) ;
 
     ApprMstResponse stateUpdate(String sabun, ApprReqRequest apprReqRequest);
diff --git a/src/main/java/com/kospo/svcm/service/PrcsService.java b/src/main/java/com/kospo/svcm/service/PrcsService.java
index 035d447..2e1e5a7 100644
--- a/src/main/java/com/kospo/svcm/service/PrcsService.java
+++ b/src/main/java/com/kospo/svcm/service/PrcsService.java
@@ -10,6 +10,7 @@ import com.kospo.svcm.model.PrcsAtt;
 import org.springframework.data.domain.Pageable;
 import org.springframework.transaction.annotation.Transactional;
 
+import java.util.HashMap;
 import java.util.List;
 
 public interface PrcsService {
diff --git a/src/main/java/com/kospo/svcm/service/impl/ApprServiceImpl.java b/src/main/java/com/kospo/svcm/service/impl/ApprServiceImpl.java
index a4a87eb..3c47c32 100644
--- a/src/main/java/com/kospo/svcm/service/impl/ApprServiceImpl.java
+++ b/src/main/java/com/kospo/svcm/service/impl/ApprServiceImpl.java
@@ -5,7 +5,6 @@ import com.kospo.svcm.config.utils.CommonUtils;
 import com.kospo.svcm.config.utils.MailUtils;
 import com.kospo.svcm.dto.req.ApprReqRequest;
 import com.kospo.svcm.dto.res.ApprMstResponse;
-import com.kospo.svcm.dto.res.GrpCodeResponse;
 import com.kospo.svcm.dto.res.PageResponse;
 import com.kospo.svcm.exception.CustomException;
 import com.kospo.svcm.exception.CustomMessageException;
@@ -17,11 +16,9 @@ import lombok.RequiredArgsConstructor;
 import org.apache.poi.util.StringUtil;
 import org.springframework.data.domain.Page;
 import org.springframework.data.domain.Pageable;
-import org.springframework.security.core.context.SecurityContext;
-import org.springframework.security.core.context.SecurityContextHolder;
 import org.springframework.stereotype.Service;
 
-import java.util.Date;
+import java.util.HashMap;
 import java.util.List;
 
 @Service
@@ -49,6 +46,15 @@ public class ApprServiceImpl implements ApprService {
         return apprMstResponse;
     }
 
+    @Transactional
+    @Override
+    public HashMap apprNoToPrcsNo(String apprNo) {
+        ApprMst apprMst = apprMstRepository.findByApprNo(apprNo);
+        HashMap map = new HashMap();
+        map.put("prcsNo", apprMst.getPrcsNo());
+        return map;
+    }
+
     @Transactional
     @Override
     public PageResponse findByApprBySabun(String sabun, Pageable pageable) {
diff --git a/src/main/java/com/kospo/svcm/service/impl/PrcsServiceImpl.java b/src/main/java/com/kospo/svcm/service/impl/PrcsServiceImpl.java
index b31ed7d..00aa460 100644
--- a/src/main/java/com/kospo/svcm/service/impl/PrcsServiceImpl.java
+++ b/src/main/java/com/kospo/svcm/service/impl/PrcsServiceImpl.java
@@ -26,6 +26,7 @@ import java.io.IOException;
 import java.nio.file.Files;
 import java.nio.file.Path;
 import java.util.ArrayList;
+import java.util.HashMap;
 import java.util.List;
 import java.util.Optional;
 import java.util.concurrent.atomic.AtomicBoolean;