A method for a vehicle dispatching system for controlling dispatching communications between vehicles and a control center mainly includes a control center and at least one vehicle. Every vehicle is equipped with a car phone. The control center includes a control computer and a data transmission device. The car phone consists of a broadcast receiver, a data transceiver, a GPS receiver, and a distance counter. By the method of the invention, the available vehicle nearest customers may be dispatched to meet customer service requirements at minimum communication costs.