1. An image display method for a stereo display apparatus, the image display method comprising: providing a stereo display apparatus, wherein the stereo display apparatus comprises a periodic structure and a pixel plane; dividing N view zones in a space; forming a plurality of projection areas corresponding to each of the view zones on the pixel plane by the periodic structure, wherein each of the projection areas corresponds to at least one sub-pixel unit on the pixel plane; obtaining an image information of each view zone according to the corresponding sub-pixel units; and displaying a stereo image by blending the image information of each view zone.