A display method of an electrophoresis display (EPD) device having a display area and a plurality of pixels located in the display area is provided. In the display method, firstly, the display area is divided into a plurality of unit areas. A plurality of pixels exist in each of the unit areas. Then, in some unit areas, at least two pixels in each of the unit areas are enabled to respectively display a first color and a second color, such that the first colors and the second colors are mixed to achieve a mixed color in vision. The first color has a maximum gray-level value. The second color has a minimum gray-level value. A gray-level value of the mixed color is between the maximum gray-level value and the minimum gray-level value.