A car rental system is developed to enable a quick customer service and improve employee performance. The system not only be accurate documentation management but also can reduce the redundancy and inconsistency of data in the system. The system consists of recording customer data and car data, car rental reservation, car rental voucher, issuing rental agreement, movement of vehicles and providing the report for management. The development has started with problem analysis and gathering user requirement. Then leading to analysis and designs the new system. For system modeling be created by Unified Modeling Language. In addition, car rental system has been developed by using Microsoft Access 2007 as database management system and Active Server Pages as a programming language. Client/Server Architecture was used to achieve the information sharing between computers on the network. The expected in new system should be enhance the effective service performance and acquire the quality information to be utilized in the business plan.