The invention provides a watermark embedding method, a watermark embedding system, a watermark extraction method, a watermark extraction system, computer equipment and a computer readable storage medium. The watermark embedding method comprises the following steps: acquiring a carrier image and a binary watermark image; receiving a preset uniform grid, carrying out region segmentation on the carrier image, calculating a selection operator of each pixel block according to the smoothness degree and the brightness degree of each pixel block obtained after segmentation, and selecting the pixel block corresponding to the maximum selection operator value as a region of interest; modifying a pixel value in the region of interest according to the binary watermark image and embedding a watermark information bit; and embedding the preset uniform grid, the binary watermark image information and the region-of-interest position information into a region outside the region-of-interest by using a reversible method to obtain an embedded image. According to the method, the visual effect after the open watermark is embedded is improved on the basis of reversibility.