commodity managing system 28 of the real store terminal 22 described later the space state management portion 30 instructs the space information storing portion 32 to update the space information data file that shows a space state of the user 39 s virtual room arranged furniture their positions etc according to the above mentioned instruction the space information storing portion 32 updates the space information data file 33 which shows a space state of the user 39 s virtual room in response to information on the commodity to be more specific the space information data file is information that shows what kind of furniture ornaments and the like exist in the user 39 s virtual room and that shows their sizes positions and the like when the user purchases a commodity in the real store a virtual commodity corresponding to the real commodity will be placed in the virtual room in addition the space state management portion 30 instructs the space information storing portion 32 to read the space information data file 33 which shows a space state of the virtual room of the appropriate user in response to an information acquisition request from the virtual space shared server 26 which has been received via the space information notifying portion 31 according to the above mentioned instruction the space information storing portion 32 supplies the space information notifying portion 31 with the space information file 33 that shows a space state of the virtual room of the appropriate user the space information notifying portion 31 notifies the virtual space shared server 26 by providing the virtual space shared server 26 with the space information data file 33 as shown in the fig9 the virtual space shared server 26 comprises a space information.