Along with the progress of the times,the car rental industry has rapidly emerged in China.This system provides the rich management information for the enterprise,using JAVA as the development language,and SQL Server2005 as the backend data-base.The efficient development tool MyEclipse is chosen.Customers can view the relevant information about the car,and enterprise managers can manage the customer related information.The design of the car rental system follows the standard development pro-cess:first,the requirements analysis would be followed by system design,including the design and connection of the database;then,develop the functionality of the implementation module;finally,the software is rigorously tested.