The harmonic suppression electrical fire monitoring device is suitable for lighting and variable frequency loads, various intelligent, automated, and precision equipment, as well as remote areas, unmanned areas, and environments with valuable items such as storage, display, and exhibition. For various complex environments, real-time monitoring of the electrical environment can be carried out, and abnormal waveforms that may cause electrical fire hazards can be promptly warned and actively repaired and treated. Without affecting the normal use of electricity by users, hidden dangers can be quietly eliminated in the bud, eliminating the risk of electrical fires from the root