With the rapid development of automotive industry, automobile control evolves from traditional analog mechanical methods to vast electronic ones. Automobiles rely on electronic systems to provide safety, comfort, and entertainment functions. Therefore, more and more diversified automotive electronic controls are needed. Automobiles, as manned vehicles, their security got more attentions. Precise electronic control and rapid response are very important. The stability is the first priority for automotive embedded systems since they need to work in harsh environments. In this paper, we have more emphases on the embedded software system of vehicles. We investigate the standard specifics of the OSEK/VDX of the car real time operation system. We also have some investigations on its software architectures and mechanisms for developing the control software for ECU in the future.