1. A hole filling method for multi-view disparity maps, adapted to an electronic device, the hole filling method comprising: respectively capturing at least one disparity map as at least one known view among a plurality of views for capturing an object; as for a plurality of virtual views among the views excluding the known view, sequentially synthesizing a disparity map of each of the virtual views by using the disparity map of the known view according to a distance of a virtual camera position or a transformed angle between the virtual view and the known view; and filling holes in the synthesized disparity map of the virtual view by using a filling information of the disparity map of each of the other virtual views having the distance or the transformed angle smaller than the distance or the transformed angle of the virtual view.