Traditional attendance systems had many drawbacks. This paper proposed an implement method of attendance management based on LBS. This method combined mobile location-based services and geographic information services, checked the position of mobile terminals held by staffs in real-time, used range search algorithm to determine whether the staff working in designated areas, generate the attendance information. This method could carry out automatic or manual attendance in real time or configure time with the staff track. It was a converged network services to achieve low-cost, high flexibility of location-based telecom value-added services. The simulation shows that the method was able to keep the staff on the issue of the validity of attendance.