With the increasingly wide range applications of Web and the continue development of Web development technology, developers urgently need a framework to simplify the development process, reduce development effort and improve development efficiency. Rails is a Web framework which is more realistic and more efficient, it has the advantages of rapid development system of PHP and the advantages of structured programs of Java. So this paper analyzed the architecture of Rails framework in-depth, and designed an information system of auto leasehold management with the characteristics of Rails framework. The system realized unified and real-time management for the branches, the network traffic, orders and settlement data. The validity and efficiency of the system was validated via test-experiment. The results show that the system can enhance the standardized management of car rental, improve the management level and the information degree of the cars rental industry. At the same time, it can also increase the crackdown of car rental fraud, establish safe and effective prevention mechanisms, and reduce the loss of car rental.