1. A layout method of sub-pixel rendering, comprising: providing a pixel rendering, wherein each pixel of the pixel rendering includes a plurality of sub-pixels, and the plurality of sub-pixels have different colors from each other; and when displaying a stereo image with a row-interlaced arrangement, dividing the pixel rendering into a first sub-pixel rendering corresponding to a left-eye image and a second sub-pixel rendering corresponding to a right-eye image; wherein each row of the first sub-pixel rendering comprises R, G, and B sub-pixels, and each row of the second sub-pixel rendering comprises R, G, and B sub-pixels, wherein a width of at least one of the first sub-pixel rendering and the second sub-pixel rendering with respect to a vertical direction is identical to a width of a single sub-pixel with respect to the vertical direction.