To meet the real-time monitoring and control requirements to unmanned aerial vehicle (UAV),a navigation electronic map module of ground control system (GCS) was designed under windows platform.This module working with displaying module, mission planning and operating module, and communication module,performed as obtaining the real-time flight information, planning the flight path, showing the real-time flight trace and so on. The function of a navigation electronic map and characteristics of the MapInfo components were introduced and analyzed. The method and process of developing the navigation electronic map for UAV GCS based on MapInfo components in Visual C+ + environment were expounded. A suit of simple and effective method based on MapX control and microsoft foundation classes (MFC) was proposed to achieve the monitoring and control to UAV and the automatic adjustment to range of the navigation electronic map-s longitude and latitude. The main process and part of key code were provided.