The present invention makes it possible and easier to serve optimum robot components/devices/accessories by means of an information service system including personal terminal devices (31A to 31C) connected to an information communication network via a telecommunication line, and a server (38) connected to the information communication network via the telecommunication line to cumulatively store information on components/devices/accessories available from a plurality of manufacturers (37a, 37c and 37c) (third party) of components/devices/accessories of a robot 1, as classified according to the attributes of the components/devices/accessories and send, to the personal terminal devices (31A to 31C) connected thereto, options information prepared based on the attribute of the cumulatively stored components/devices/accessories information and including a plurality of items for selection of a robot component.