To provide a device with which the position or condition of a monitored object can be recognized independent of its position, and equipment can be controlled through simple operation without limiting a monitoring area.

A system to perform image acquisition upto recognition is miniaturized like a button or badge and attached to a monitored object 9, so that the scenery around the monitored object is recognized and compared with image information registered in advance to allow the position of the monitored object to be recognized. Besides, the operating condition of the monitored object can be recognized from fluctuations of the scenery as well. Further, by arranging this device near its operator, the position or action of a hand, for example, is recognized and corresponding to that position, equipment can be controlled.