The Infrared Thermometer is a non-contact solution designed for rapid detection of abnormal body temperatures among travelers. Leveraging thermal imaging and intelligent facial recognition algorithms, the system accurately identifies and tracks individuals with elevated body temperatures while effectively filtering out false alarms caused by external heat sources such as hot beverages or food. Equipped with an HD camera and AI-based analysis, the system enables automatic detection, real-time alerting, and image capture of potential febrile cases. The system incorporates a high-precision blackbody radiation source as a temperature reference to compensate for environmental influences and thermal drift of the imaging sensor. This ensures consistent temperature calibration, fast warm-up, and precise thermal control, significantly improving measurement accuracy and system reliability under complex environmental conditions. It is ideal for deployment in wide-area temperature screening scenarios such as public halls and overhead corridor installations.