PURPOSE: To obtain the sense of the palm by starting, changing, and stopping an image on the display device of a microcomputer system by the signal of a palm motion detector, displaying the hand and a hand power desiring image on a photographic image, and moving the image tuning with the motion of the hand.

CONSTITUTION: The palm motion detector 1 comprises a reed switch and a magnet loaded on a finger, and it is set at the part of a body requiring a hand power. The image displayed on the display device 3 of the microcomputer system 2 is started, changed and stopped by a detection signal. The hand and the hand power desiring image are displayed on the photographic image, and it is controlled so as to be moved tuning with the hand. In such a case, motion in all direction and the circular motion of the palm, etc., can be displayed by providing four reed switches. The motion in the upper/lower or rightward/ leftward direction can be displayed by two switches, and the contact with the hand by one switch. A personal computer display in a personal computer and a home television receiver in an electronic game machine can be used as the display device 3.