To materialize a virtual concert by which real time nature and an atmosphere created together with other audiences are actually felt.

An AV (Audio-Visual) reproducing device determines whether a virtual concert mode is established by a user or not in Step 1. When determination is made that the virtual concert mode is established, processing proceeds to Step 2. The AV reproducing device starts communication with a promotor server through the Internet and then operates each section in accordance with a control signal sent from the promotor server 1. Where, the virtual concert mode is not established in Step 1. Namely, when determination is made that an ordinary mode is established, the processing proceeds to Step 3. The AV reproducing device controls each section for operation in accordance with a command from the user using a remote control or the like. For example, this system is applied to an AV reproducing device allowed to be connected to the Internet.