Interphone is used to dispatch vehicle in Flight Service at many airports in China. Former service manners have the advantages of low speed, poor real time ability, etc., which make the manager can not acquire every vehicle's working state in time. Therefore, a powerful Flight Service Vehicle Dispatching Management System becomes necessary. Firstly, the Wireless Local Area Networks (WLAN) around the airport is built as the base environment. Each ground crew and vehicle are equipped with a PPC(Pocket PC), which is assembled with Wi-Fi and GPS module. Ground crew can directly and quickly send messages to the vehicle they want to dispatch through WLAN. The Control Center can easily get working state and position of each vehicle. And Ground crew can also send exceptional unit photos of airplane to the Control Center. The program of PPC and server is developed based on C/S structure, and the Control Center is based on B/S structure. They are designed with components technique so as to be reused and shorten software development cycle. The system is developed with Microsoft Visual Studio 2005-C#.net.