Electric appliance monitoring method and device

The invention provides an electric appliance monitoring method and device, and relates to the technical field of power systems, and the method comprises the steps: obtaining the transient current data of a user bus; generating time domain features according to the transient current data; dividing the time domain feature into a plurality of time domain window features; converting the plurality of time domain window features into corresponding frequency domain window features; determining the similarity between the current frequency domain window feature and the adjacent previous frequency domain window feature; extracting a frequency domain vector and a harmonic vector corresponding to the frequency domain window features, and calculating a frequency change vector and a harmonic change vector; inputting the frequency change vector and the harmonic change vector into a trained classification model to obtain an electric appliance classification result; and generating an electric appliance monitoring result accor