1. A method for re-registering at least one set of image information of an object to be aligned to align the object by an imaging unit, the image information including photographing conditions and position data of the object which have been previously registered by capturing an image of the object with the imaging unit, the method comprising: automatically moving at least one of the object and the imaging unit based on the position data of the image information and re-capture the image of the object with the imaging unit by using the previously registered photographing conditions of the image information; and re-registering the image information by using the re-captured image of the object.