Infrared thermal imaging has various applications in intelligent buildings, which detects and analyzes temperature distribution by using infrared radiation energy emitted from objects, thus realizing the monitoring and management of the internal and external environment of the building. In terms of building HVAC, it can be used for energy assessment, fault diagnosis, leakage source localization, etc., to quickly locate the fault point and provide a basis for accurate maintenance; combined with the traditional perimeter physical defense measures (fences, iron fences, etc.), it forms a relatively complete perimeter technical and physical defense system; it can be used to effectively and timely report and warn of the fire situation, improve the ability to prevent and respond to fires, and protect the safety of people's lives and property. People's life and property safety.