1. A parts list system comprising: a CAD section which generates a CAD figure of a part included in an apparatus based on design reference data, and extracts a part number of said part, configuration part numbers and attribute data from said CAD figure, wherein said design reference data is references for designing said apparatus, said configuration part numbers are part numbers of configuration parts of said part, and said attribute data indicate properties of said part and said configuration parts; and a parts list section which generates a parts list of said apparatus based on said part number, said configuration part numbers and said attribute data extracted from said CAD figure, and said design reference data, wherein said parts list relates said part number, said configuration part numbers and part data, said part data indicate properties of said part and said configuration part and include said attribute data; wherein said CAD section modifies said CAD figure based on modification command, and extracts said part number, said configuration part numbers and said attribute data from the modified CAD figure, said modification command indicates command for modifying design of said part and are inputted through network when said parts list section discloses said parts list on said network, and wherein said parts list section modifies said parts list, based on said part number, said configuration part numbers and said attribute data extracted from said modified CAD figure.