A comprehensive detection system for automotive electronic thermostats based on embedded systems was designed.Air was used as the leak test medium to improve the efficiency and safety of traditional detection systems based on PLC and water media.The system consisted of an upper computer and a lower computer:STM32F405RGT6 processor was used in the lower computer;the upper computer was developed based on LabVIEW software.The system can be used to complete the internal leakage test,external leakage test and flow test of the automotive electronic thermostat.It can collect the working voltage,current and temperature of the motor in real time,complete the calibration of the motor position and angle sensor,and generate data reports and curves,and finally determine whether the sample thermostat is qualified or not.