The invention discloses an evaluation method, device and equipment for a metal corrosion state, and the method comprises the steps: collecting a corrosion image of to-be-assessed power equipment metal, carrying out the color space conversion from an RGB model to an HIS model of the corrosion image, and extracting the colorimetry characteristic quantity of the corrosion image; after carrying out gray scale conversion and preprocessing operation on the corrosion image, calculating the morphology and texture characteristic quantity of the corrosion image; inputting the chromaticity characteristicquantity and the morphology texture characteristic quantity into a target corrosion evaluation network, and outputting a corrosion state evaluation value of the corrosion image; and determining the corrosion degree of the power equipment metal to be evaluated according to the corrosion state evaluation value. According to the method, the device and the equipment provided by the invention, the metal corrosion state evaluation efficiency is improved.