Interaction between a virtual object and the real space is to be presented in a preferred manner.In accordance with a user's viewing or finding of an actual object 151, the virtual object 150 corresponding to the actual object 151 appears. The actual object 151 includes output devices that generate outputs such as vibration, electric pulse, heat or cooling air, wind, sound, light, a transfer, and a jump. The actual object 151 performs reaction to action performed on the actual object 151 by the virtual object 150. Where interaction is conducted between the virtual object 150 and the actual object 151 in synchronization, a stronger impression of reality can be given to the user.