an optical information recording and reproducing method and device , whereby it is possible to prevent reduction in information recording capacity of an optical card and increase in recording and reproduction time due to track jump operations , and there is no occurrence of track jumping errors due to oscillations associated with acceleration and deceleration of the relative speed of movement between the optical card and an optical head . a region where the optical head and optical card are moved at a constant speed relative to each other is provided in the acceleration or deceleration of the relative speed of movement , and a track jump operation is implemented in this region .