Abstract: A method and device for rectifying an image photographed by a fish-eye lens, comprising the following steps: acquiring a fish-eye lens mapping parameter and a lens field angle; acquiring a fitted mapping curve according to the lens mapping parameter; acquiring centre coordinate and the radius of a fish-eye circle in a fish-eye image; creating a blank image used for rectifying the image according to the lens field angle; based on the lens field angle, the fitted mapping curve, the centre coordinate and the radius of the fish-eye circle, and the width and height of the blank image, mapping a point on the blank image used for rectifying the image to a corresponding point in the fish-eye image; and based on a colour sample of the corresponding point in the fish-eye image, drawing same onto the corresponding point in the blank image used for rectifying the image, and drawing the rectified image.