An image reconstruction method includes: fetching at least two images; calculating a relative displacement between those adjacent images by utilizing a phase correlation algorithm; calculating an absolute displacement between any one of those images and the first image of those images; and computing a common area of those images by utilizing the relative displacement and the absolute displacement, then deleting remainder portions of the image excluding the common area; and accumulating the common area of every image. In the present invention, the phase correlation algorithm can be utilized to process numerous noise signals so as to get a higher precision of the image reconstruction.