The invention relates to a method for registering an infrared image and a visible light image of electrical equipment. The method comprises the steps that 1, the infrared image and the visible light image are preprocessed, and an image to be registered and a reference image are obtained; 2, the feature points of the reference image and the image to be registered are calculated, and feature descriptors of the feature points are set up; 3, the feature points are matched according to the feature descriptors; 4, a robust point set registering algorithm RPM-L2E is carried out on the matched feature points to obtain a deformation parameter from the image to be registered to the reference image, and interpolation is carried out on the infrared signal to obtain a registered image. According to the method, infrared and visible light information is fully utilized, regional information of the feature points is described through the Mrogh descriptors, wrong feature points are removed, the deformation parameter from the image to be registered to the reference image is obtained, the feature point matching effect is still good when large rotating and scale changing happen to the image to be registered and the reference image, and certain robustness is achieved on noise.