| Along with the development and progress of social and economy in recent years, the transportation rise rapidly, more and more vehicles driven into people's life. The increase of road traffic results in the loss of our country and people for the highway construction lagging development, which also leads to the traffic accident happened frequently and pressure rise sharply. Owing to the limited resources and financial resources and the pressure of the natural environment, the project of the highway construction will be restricted, so other ways which can meet the increasing demand of transportation will be relied on. A technology should be introducing and using, it's the vehicle location and on-board monitor system. It is a good way to solve this problem and it is a part of Intelligent Traffic System. We have got a way that would maximize the use of existing resources.It includes vehicles of positioning,monitoring and controling.It will help to achieve the goal of saving the transportation time, vehicles surveillance and managing in a scientific way.The thesis gives an introduction of the technology that is applied. They are the Global Position System (GPS), the General Packet Radio Service (GPRS), the Geographic Information System (GIS) technology, the single chip and the watching center of B/C mode. The system contains two important parts:the centralized watching center and the mobile terminals, and they were described from the element of hardware and the design and implementation of software. Then this system has its own special signal detection to satisfy the specified requirements. When the lid of oil tank is opened, the van is discharging and surveys discharge quantity. These informations are detected from sensors that were installed in different position.This system is exploited in view of the actual requirement, which realize the complete monitoring, control function for physical distribution fleet. At the same time, it has a low cost for developer.
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