To contribute to a drastic reduction in metallic mold design cost in a forming and fabrication maker (metallic mold maker) and also to enable quick and accurate metallic mold design.

When primary data Dx in relation to product design transmitted from a client computer 2 via the Internet N are uploaded to server compute 3, the primary data Dx are subjected to conversion processing into secondary data Dy for metallic mold design of a different data format, and when the conversion processing is completed, the secondary data Dy are stored so as to be able to be downloaded from the computer 2.