Infrared thermal imaging cameras convert invisible infrared radiation into visible thermal images and reflect the temperature distribution of the target surface. Different objects and even different parts of the same object differ in their ability to radiate and how strongly they reflect infrared rays. By exploiting the difference between the radiation of an object and the background environment, as well as the difference between the radiation of various parts of the scene itself, an infrared thermal image can show the rise and fall of various parts of the scene, and thus reveal the characteristics of the scene. The transformer is an important equipment of the power supply system, and the failure is initially accompanied by partial or overall temperature abnormalities. ATO thermal imaging cameras can detect and diagnose equipment failures simply, safely, in real time and intuitively, ensuring equipment safety and long-term operation.