1. A method for acquiring a PET image with ultra high resolution using movement of a PET device, comprising: (a) a driving member 30 driving the PET device by a driving control unit 400 ; (b) performing sampling p times for respective detectors 44 by driving of the PET device, and a PET signal receiving unit 200 receiving a plurality of PET data; (c) an image reconstructing unit 300 acquiring the PET data acquired from the PET signal receiving unit 200 , and acquiring position information of the PET device from the driving control unit 400 ; and (d) the image reconstructing unit 300 reconstructing an image using the acquired PET data and the position information, wherein the step (d) is performed in an iterative method that corrects an existing pixel value X old j to a new pixel value X new j using the acquired PET data and the position information, wherein the iterative method iterates acquiring a translation operation value Tp that is the position information, obtaining a correction factor sinogram by performing forward projection, and then returning to coordinates of the original image by performing backward projection.