Society into the information network era, the requirements of the vehicle no longer be satisfied with a means of transport, but also want to live and work car is an extension of the scope, in the car like in their own office and home work and At the same time, the growing automotive electronics and also the rapid development of automotive technology was considered in the development process of a revolution of automotive electronics is a measure of the degree is seen as an important level of Hyundai Motor With computer technology, communication technology, the rapid development of integrated circuit technology in order to figure represented Fieldbus field instrument, equipment, a large number of applications, red tape has been the scene of a single simple connection of fieldbus networks in place of, the quality of signal transmission also greatly improved, cars have begun to enter the Internet A In the last decade, the users of motor vehicles for the comfort, safety and environmental requirements such as performance In order to meet these ever-increasing demand for computer-controlled vehicle electrical and electronic equipment increased dramatically, making vehicles (especially cars) the design of the layout of electrical circuits has become increasingly In addition, a variety of automotive electrical and electronic connector of the ensuing surge in the number of motor vehicles traveling on the course because of the failure point connector automotive electrical and electronic equipment on the issue of failure to perform its functions more and more To address these problems, many new models (especially the high-end models) the beginning of the development of the wider use of computer network In this paper, computer network technology in the automotive application of the basic principles of network technology on the inside and outside the vehicle, the introduction of the internal network, introduced the characteristics of automotive and automotive standards for the internal network, focuses on the control of the main local area network CAN characteristics and their Vehicle performance in accordance with the role of the impact of division of motor vehicle electronic products can be summarized as two types: one is the automotive electronic control devices, including the engine, chassis and body electronic One is car-car electronic devices, including motor vehicle information systems, navigation systems, car audio and video entertainment systems, automotive communications systems, Internet