Movable object position detection system

The present invention is to realize a movable object position detection system that can recognize the position and orientation of the movable object such as a robot to easily. The ceiling 202 of the chamber 201, a television camera 203 infrared light transmitting filter 204 is attached is arranged. The floor surface 205, the object 206 the light emitting element 207 to 209 is mounted for emitting infrared light is disposed movably. Video signal 211 output from the television camera 203 is input to the image processing apparatus 213. The image processing apparatus 21 transmits X of the object 206, the position information representing the Y coordinate position and orientation from the first antenna 215. Object 206 receives the position information by the second antenna 217. Therefore, the processing object 206 side creates its own location information is not necessary. Moreover, not an eyesore to the man if caused to emit infrared light.