The invention relates to an electronic equipment fault detection method, device and equipment and a range hood. The method comprises the steps of when electronic equipment is located in a working state, obtaining an original noise signal of the electronic equipment before active noise reduction; carrying out noise analysis on the electronic equipment according to the original noise signal so as toobtain a noise sound pressure level and noise spectrum information before the noise reduction; and carrying out fault analysis on the electronic equipment according to the noise sound pressure leveland the noise spectrum information before the noise reduction so as to obtain and output a fault detection result. Before the active noise reduction is carried out, intelligent analysis is firstly carried out on the original signal, and the working state of the electronic equipment can be obtained according to the analysis result, so that the influences, on the fault detection, of an active noisereduction function of the equipment are effectively avoided, and the fault detection efficiency of the equipment with the active noise reduction function is improved.