diff --git a/src/main/java/com/iflytop/nuclear/controller/TaskController.java b/src/main/java/com/iflytop/nuclear/controller/TaskController.java
index 3fc25c8..297ce74 100644
--- a/src/main/java/com/iflytop/nuclear/controller/TaskController.java
+++ b/src/main/java/com/iflytop/nuclear/controller/TaskController.java
@@ -115,4 +115,15 @@ public class TaskController {
         return ResponseData.success(taskVO);
     }
 
+    @PostMapping("/next")
+    public ResponseData getNextCood(@RequestBody Map<String,String> taskInfo) {
+        String coord = taskInfo.get("coord");
+        String taskId = taskInfo.get("taskId");
+        String direction = taskInfo.get("direction");
+        String result = taskService.nextCoordString(coord, taskId, direction);
+        JSONObject jo = new JSONObject();
+        jo.put("result", result);
+        return ResponseData.success(jo);
+    }
+
 }
diff --git a/src/main/java/com/iflytop/nuclear/service/TaskService.java b/src/main/java/com/iflytop/nuclear/service/TaskService.java
index 0109ff2..79e781f 100644
--- a/src/main/java/com/iflytop/nuclear/service/TaskService.java
+++ b/src/main/java/com/iflytop/nuclear/service/TaskService.java
@@ -16,4 +16,6 @@ public interface TaskService extends IService<Task> {
     List<TaskVO> getTaskInfoByUsername(String username, String user_role);
 
     TaskVO processTask();
+
+    String nextCoordString(String coord, String taskId, String direction);
 }
diff --git a/src/main/java/com/iflytop/nuclear/service/impl/CheckServiceImpl.java b/src/main/java/com/iflytop/nuclear/service/impl/CheckServiceImpl.java
index cbeea16..a2de0c1 100644
--- a/src/main/java/com/iflytop/nuclear/service/impl/CheckServiceImpl.java
+++ b/src/main/java/com/iflytop/nuclear/service/impl/CheckServiceImpl.java
@@ -438,4 +438,20 @@ public class CheckServiceImpl implements CheckService {
         }
         return "";
     }
+
+    /**
+     * 传入当前检查的坐标点
+     * @return  获取上一个坐标点
+     */
+    public String getPreCoord(String current, int order){
+        if (current == null ) {
+            return null;
+        }
+        String[] split = current.split("-");
+        int mainLine = Integer.parseInt(split[0]);
+        int minorLine = Integer.parseInt(split[1]);
+        if (order == 0) {}
+        if (order == 1) {}
+        return null;
+    }
 }
diff --git a/src/main/java/com/iflytop/nuclear/service/impl/TaskServiceImpl.java b/src/main/java/com/iflytop/nuclear/service/impl/TaskServiceImpl.java
index 27df59c..dd06cef 100644
--- a/src/main/java/com/iflytop/nuclear/service/impl/TaskServiceImpl.java
+++ b/src/main/java/com/iflytop/nuclear/service/impl/TaskServiceImpl.java
@@ -7,6 +7,7 @@ import com.iflytop.nuclear.model.*;
 import com.iflytop.nuclear.service.*;
 import com.iflytop.nuclear.vo.TaskVO;
 import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.context.annotation.Lazy;
 import org.springframework.stereotype.Service;
 
 import java.util.ArrayList;
@@ -27,6 +28,10 @@ public class TaskServiceImpl extends ServiceImpl<TaskMapper, Task> implements Ta
     NuclearStationService nuclearStationService;
     @Autowired
     AccountService accountService;
+    @Lazy
+    @Autowired
+    CheckServiceImpl checkServiceImpl;
+
 
     @Override
     public List<TaskVO> getTaskInfoByUsername(String username, String user_role) {
@@ -112,4 +117,23 @@ public class TaskServiceImpl extends ServiceImpl<TaskMapper, Task> implements Ta
         }
         return null;
     }
+
+    @Override
+    public String nextCoordString(String coord, String taskId, String direction) {
+        // 根据taskId查询order 规则的下一个已经写好，需要再写一个上一个
+        Task task = this.getById(taskId);
+        int checkOrder = task.getCheckOrder();
+        if ("1".equals(direction)) {
+            if (coord.equals("finish")) {
+                return null;
+            }
+           return checkServiceImpl.getNextCoord(coord, checkOrder);
+        }else {
+            if (coord.equals("start")) {
+                return null;
+            }
+            return checkServiceImpl.getPreCoord(coord, checkOrder);
+        }
+        return null;
+    }
 }