To provide a controller that selects a shape that can be easily formed with fingers and is hardly misrecognized and register as a cue sign, and can control an apparatus that is to be controlled and the operation of the apparatus with the cue sign formed with fingers and the movement of the cue sign.

A controller is formed of a control circuit 2001 formed of a microcomputer, an image sensor unit 2002, and a memory 2003. Communication connection with a control circuit is established among an illumination control unit 2004 of an illumination apparatus 1006, a shade control unit 2005 of a shade 1008, and an air-conditioning control part 2006 of air-conditioning equipment 1009.