A display panel, a display method and a display device are disclosed; the display panel comprises sub pixel units of red (R), green (G), blue (B) and one other color (X), wherein the sub pixel units are arranged into a sub pixel unit array, the sub pixel units in the sub pixel unit array are all in a cross shape, the cross shape being constructed with rectangles with an aspect ratio of 3:1 in transverse and longitudinal directions, and the cross shape having equal lengths in the transverse and longitudinal directions; and respective sub pixel units in the sub pixel unit array are interlaced with each other sequentially and arranged periodically. The display panel makes the pixel structure more compact and the pixel sharing property more obvious.