The embodiment of the invention discloses a mosaic image generation method and device, apparatus and a storage medium. The mosaic face image generation method comprises the following steps: dividing an initial face image collected by an image collector, and determining a key area in the initial face image and an adjacent area adjacent to the key area; selecting a first gray value and a second grayvalue with the maximum difference degree from the at least two gray values; distributing the first gray value to a key area, distributing the second gray value to an adjacent area, and converting theinitial face image into a gray-scale pixel face image according to the distributed gray value; and controlling the robot to obtain mosaic pixel square pieces from the at least two kinds of mosaic pixel square piece sorting areas according to the gray values of the pixel blocks in the gray-scale pixel face image, and splicing the obtained at least two kinds of mosaic pixel square pieces to obtaina mosaic face image. According to the embodiment of the invention, the problem that the key area of the mosaic face image is not obvious is solved.