The invention relates to the image processing field, especially to an image color switching. The invention provides a method and a device for adjusting image color switching. The method comprises the following steps: recording key color switching values input by a user in an RGB color space; and utilizing the key color switching values, and obtaining a color space mapping relation by selecting nearest points of eight quadrants through differentials. The switching relation of the whole space is obtained by using users to determine switching values of the key color. The invention can be mainly applied to the color switching for various purposes to digital images.