In order to solve the unreasonable and too costly of fuel use at the status of cash settlement, designed an oil charging intelligent management system for service car based on vehicle network technology relying on electronic label identify technology, radiofrequency technology, GPRS technology, database technology and publishing technology of dynamic web page. The working process of the system is explained and the design of software and hardware are also realized. Under the premise of not changing the existing filling device and equipment of the gas station,experiments show that the system has stable operation, high reliability, low cost at design and operating .The system improved the informationization and intelligent management at oil charging and financial settlement for service car, has high application value.