Abstract: This paper presents the design of a smart wiper control system. In the system, a rain sensor with LIN bus interface is used to obtain rainfall and light intensity signal, and there are five modes such as auto, off, intermittent, slow and fast mode. When the system works in intermittent or auto mode, the wiper can be intelligently controlled according to the rainfall, and manual operation is unnecessary. The control system also has a CAN bus communication interface, which can send lighting control and window control commands to other node. When other node receives the commands it will turn on / off headlights and close the windows. The system greatly improves driving safety and comfort in rain day, and is reliable. The cost of the system is low, therefore, it has great prospect of application.