Abstract: The LabWindows/CVI is used as the design platform of monitoring software. It integrates debugging and monitoring modes, and establishes man-machine interface between monitoring software and automatic portable station through distributed control communication of CAN bus. The designed monitoring software can easily and quickly adjust the azimuth, pitch and polarized motor angel adjustment of the automatic portable station and realize the satellite change operation of the portable station to the target satellite through parameter setting. It can monitor the attitude data of the portable station in real time, such as the azimuth, pitch angle, beacon signal strength, electric push rod length, GPS longitude and latitude,and monitor the beacon setting status, GPS data, satellite area, azimuth pitch limit and alarm position.