The CAN Bus (Controller Area Network Bus) is the main base of this paper. It is embedded with the Automotive Infotainment System. The core is Intel PXA255, and is equipped with Windows CE 5.0. All the automotive parts in this system are controlled by CAN Bus. It is Chinese-English input system is WinCE, which uses Touch-Panel as the interface. Using the Free International Standard Communication-Protocol as the system-development platform, the system is not only costless but also time saved.