A stereoscopic image display method for use in a stereoscopic image display apparatus comprising a pair of shutter glasses having a left eyeglass lens and a right eyeglass lens, the method comprising: receiving stereoscopic information; generating a left-eye image, a right-eye image and a common sub-image according to the stereoscopic information, wherein the method is characterized in that the common sub-image is an intersection of the left-eye image and the right-eye image where the left-eye image and the right-eye image have almost no parallax, and the method further comprises: displaying the left-eye image, the right-eye image, and the common sub-image on the stereoscopic image display apparatus according to a predetermined display order; activating only the left eyeglass lens to observe the left-eye image when the stereoscopic image display apparatus displays the left-eye image; activating only the right eyeglass lens to observe the left-eye image when the stereoscopic image display apparatus displays the right-eye image; and activating both the left eyeglass lens and the right eyeglass lens to observe the common sub-image when the stereoscopic image display apparatus displays the common sub-image; wherein the predetermined display order is the left-eye image, the common sub-image, the right-eye image, and then the common sub-image; or the predetermined display order is the left-eye image, the common sub-image, and then the right-eye image. receiving stereoscopic information; generating a left-eye image, a right-eye image and a common sub-image according to the stereoscopic information, wherein the method is characterized in that the common sub-image is an intersection of the left-eye image and the right-eye image where the left-eye image and the right-eye image have almost no parallax, and the method further comprises: displaying the left-eye image, the right-eye image, and the common sub-image on the stereoscopic image display apparatus according to a predetermined display order; activating only the left eyeglass lens to observe the left-eye image when the stereoscopic image display apparatus displays the left-eye image; activating only the right eyeglass lens to observe the left-eye image when the stereoscopic image display apparatus displays the right-eye image; and activating both the left eyeglass lens and the right eyeglass lens to observe the common sub-image when the stereoscopic image display apparatus displays the common sub-image; wherein displaying the left-eye image, the right-eye image, and the common sub-image on the stereoscopic image display apparatus according to a predetermined display order; activating only the left eyeglass lens to observe the left-eye image when the stereoscopic image display apparatus displays the left-eye image; activating only the right eyeglass lens to observe the left-eye image when the stereoscopic image display apparatus displays the right-eye image; and activating both the left eyeglass lens and the right eyeglass lens to observe the common sub-image when the stereoscopic image display apparatus displays the common sub-image; wherein the predetermined display order is the left-eye image, the common sub-image, the right-eye image, and then the common sub-image; or the predetermined display order is the left-eye image, the common sub-image, and then the right-eye image.