Provided in the application are an image processing method and a system. The method comprises the steps of: obtaining pixel data of a target image, constructing a mapping function f 1(x) about the target image in an equal hue plane, allowing a mapping function g(x) to be automatically regulated according to the pixel data of the target image according to the pixel data of the target image and the mapping function f 1(x), and outputting a final image to allow different images to keep colors and details of original images in the color gamut mapping.