Important equipment such as high-voltage switchboard, ring main unit, transformer, and knife switch in the power supply system may experience aging, loose contacts, surface oxidation and corrosion during long-term operation, which may easily lead to temperature anomalies. If not detected and dealt with in time, it may cause safety accidents such as melting, combustion, and even explosion. This system monitors the temperature of key nodes of equipment (such as busbars, cables, plugs, output terminals, etc.) in real-time through passive (induction power, RFID) wireless methods. It uses the IoT platform to complete fault location, data analysis, abnormal judgment, safety warning, and other personalized information services