Abstract: When a display part to be set as a similar part search target is selected from among a plurality of display parts displayed on a design screen, an operation of selecting an executing button for a single-part search is performed on a recommender execution selecting screen, and an operation of selecting a YES button is performed on a search execution confirmation screen. The model number of the one display part being selected is extracted, a server is accessed via the Internet, and similar part search data including the extracted model number is transmitted. A CPU of the server refers to similar part data stored in a memory, and retrieves similar part model numbers associated with the extracted model number. The part data of the extracted model number and the part data of all of the retrieved similar part model numbers are transmitted from the server to a user terminal.