The most basic functions of wiper test system for modern high-grade cars are to provide accurate measurement of swing times of the wipers and real-time control of LIN wiper motor. In this paper, the design of a wiper test system composed of Hall sensor, LIN bus and MCU has been developed based on the research on Hall sensor and LIN bus. In the system, MCU is used to collect information of the swing counting sensors and controls the LIN motor. USB bus is chosen to interconnect the embedded system and the computer and counting sensors are responsible for wiper swing counting. Tests and actual operation showed that the wiper test system proposed in this paper is feasible, which offered automated wiper test and ensured quality of wipers. The system is of high practical application value.