Fire electrical inspection and building fire protection facility inspection are important means of fire safety inspection. It is far from enough to use primitive methods such as seeing, touching, and sniffing to conduct fire safety inspections on electrical circuits and fire-fighting equipment. Advanced equipment and modern inspection techniques must be used to complete. At present, electrical fire detection generally uses infrared temperature measurement technology, infrared thermal imaging technology, ultrasonic detection technology, harmonic analysis technology, combined with professional electrical measurement technology to complete. In order to prevent and reduce the occurrence of electrical fires and ensure the safety of citizens and social property, the fire protection policy of "prevention first, prevention and elimination combined" is followed. In view of the basic characteristics of electrical fires, effective fire electrical inspections should be carried out. According to modern physical phenomena such as thermal radiation, acoustic emission, and electromagnetic emission during the operation of electrical facilities, the quantitative monitoring of electrical facilities is carried out by using advanced instruments and equipment combined with traditional inspection methods. It can detect electrical devices by infrared, laser, ultrasonic, carrier wave and other means under the condition of "non-power-off" and "non-contact". And through computer processing, many factor