Abstract: According to the problems of temperature measurement low efficiency, inaccurate temperature measurement and high missed detection rate of traditional non-contact temperature measurement technology, this paper presented a large flow intelligent temperature measurement system based on the fusion of portrait detection, personnel tracking and infrared thermal imaging. The system obtained face information through portrait detection technology; continuously tracked human body and accurately locate the position of face and forehead through personnel tracking technology; obtained the face temperature by infrared thermal imaging technology, and associated the temperature measurement data with the face information, achieved accurate temperature measurement.