Abstract: An image scaling device includes: a housing including a main body member and a handle member; a control unit in the housing and including an image capture module, a display module, an image processing module and a micro switch module, wherein the image capture module is configured for capturing an image, and the micro switch module is in the handle member and configured for generating a first signal and a second signal, so the image processing module processes the image according to the first signal or the second signal to reduce or enlarge the image, such that the image is displayed on the display module; and a rotation unit arranged around the handle member and being able to rotate along a first rotation direction or a second rotation direction relative to the handle member to trigger the micro switch module to generate the first signal or the second signal.