In view of the disadvantage of high hardware dependence of "Visible Light" + "Thermal Infrared" fusion two-light face detection algorithm.This paper proposes an infrared face detection algorithm based on Mobilenet-SSD,which can directly detect the face region in the infrared image and has a low dependence on hardware.At the same time,the experimental results show that the detection accuracy and real-time performance of the algorithm is improved;this can be directly applied to the intelligent temperature monitoring system during the “epidemic” period.