1. An apparatus for controlling a digital image processing device that includes an image input unit for receiving an image for photographing and a display unit for displaying the image, the apparatus comprising: a motion sensing unit in communication with the image input unit that determines whether the digital processing unit has moved or is moving by assessing whether the difference between an evaluation index of a current image frame and an evaluation index of a previous image frame is greater than a preset reference value and generates a motion sensing signal according to the determination; and a control unit in communication with the motion sensing unit for receiving the motion sensing signal, the control unit operating the digital image processing device in a power saving mode, wherein the display unit operates in a reduced power consumption mode when, according to the motion sensing signal, the control unit determines that the digital image processing device has moved or is moving.