1. An apparatus for automatically compensating for an image gradient of a mobile communication terminal display, the apparatus comprising: an image input unit adapted to receive a user's image, determine the user's line of sight, and generate user image information corresponding to the user's line of sight; a data process unit adapted to receive user image information from the image input unit, calculate an image gradient related to the angle between the user's line of sight and the terminal, and generate control information corresponding to the image gradient; and a display unit adapted to display a viewable image, the viewable image adjustable based upon the control information.