Provided is a method of searching images stored in a digital storage device. The method includes: categorizing photographed images into a plurality of categories according to their characteristics; displaying a predetermined number of thumbnail images on a monitor of the digital storage device; and displaying thumbnail images on a different page within the same category on the monitor if a first signal is received, or displaying thumbnail images of a different category on the monitor if a second signal is received. Thus, the user may quickly and easily find a desired image among hundreds of images stored in the digital storage device.