Provided is technology enabling the generation of images of high realistic sensation upon accurately reflecting the operator's behavior. The information processing device has a controller to be used for inputting an operational instruction, and having a function of outputting a detectable wave to be used for detecting its own position and direction; a plurality of sensors for detecting the intensity of the detectable wave transmitted from the controller at mutually different positions; a position/direction calculation unit for calculating the position and direction of the controller in a real space based on the ratio of the intensity of the detectable wave detected with each of the plurality of sensors; an image generation unit for generating an image reflecting the operational instruction input with the controller, and the position and direction of the controller calculated with the position/direction calculation unit; and a display unit for displaying the image generated with the image generation unit.