An image processing method and an electronic device thereof are provided. The image processing method includes performing a color processing procedure on the target pixel and correspondingly obtaining a plurality of first processed pixels. The color processing procedure includes: determining, according to the color saturation value of the target pixel and a color partitioning parameter, that the target pixel is located in a low color saturation region, a medium color saturation region, or a high color saturation region; performing suppression processing on the target pixel located in the low color saturation region, to suppress the color saturation value of the target pixel into a grayscale value; performing progressive suppression processing on the target pixel located in the medium color saturation region, to suppress the color saturation value of the target pixel according to a suppression ratio; and maintaining the original color saturation value of the target pixel located in the high color saturation region.