Abstract: Temperature measurement technology based on infrared thermal imaging has been widely developed and applied in fields such as aerospace, national defense, materials, and energy owing to its non-contact process, wide temperature measurement range, rapid response speed, and high sensitivity. This paper begins with the basic principles of infrared temperature measurement technology, introduces the current status of research on infrared temperature measurement methods and radiation calibration technology, and lists several typical infrared temperature sensors and their key domestic and international technologies. Finally, a summary and outlook on the development trends of temperature measurement technologies based on infrared thermal imaging are presented.