the movement to the designated virtual space step s 4 5 the user terminal apparats 12 also require the virtual world manager apparatus 10 of virtual space data of the destination so that the apparatus 12 displays an image of the virtual space transmitted from the virtual world manager apparatus 10 on the screen and in case substitutes of other users are joining this virtual space also displays images of these substitutes step s 4 6 in case the user selects a substitute of another user joining the virtual world to request for communication on the user terminal apparatus 12 that waits for an event occurrence step s 4 4 the user terminal apparatus 12 requires the virtual world manager apparatus 10 to transfer information on a user terminal apparatus 12 related to the substitute selected by the user step s 4 7 and the user terminal apparatus 12 requires the user terminal apparatus 12 identified by the information transferred from the virtual world manager apparatus 10 requested of communication step s 4 8 so that communication with a partner is enabled through a user terminal apparatus 12 at a destination of the user even if the partner corresponding to the substitute has physically moved in case the user terminal apparatus 12 waits for an event occurrence step s 4 4 is informed by the virtual world manager apparatus 10 that another substitute has moved to the virtual space which the user terminal apparatus 12 is joining an image of the informed substitute is displayed in the virtual world step s 4 9 in.