A remote control system includes: an electric home terminal device 11 having a control program; a server PC 12, for transmitting control data to the electric home terminal device 11 and for registering three-dimensional model data concerning the electric home terminal device 11; and client PCs 14, 15 and 16, for receiving the three-dimensional model data from the server PC 12, wherein the client PCs 14, 15 and 16 perform an additional operation upon the receipt of specific three-dimensional model data from the server PC 12, and transmit, to the server PC 12, update data for a three-dimensional model obtained by the additional operation, and wherein the server PC 12 transmits, to the electric home terminal device 11, the control data based on the update data for a three-dimensional model received from the client PCs 14, 15 and 16.