Abstract: A design system based on design options with a shared data base is disclosed. Further, a method therefor and a recording medium are disclosed. A computer-aided design system (CAD) is made to be interlocked to a data management system, so that the productivity aggravation due to the low efficiency and errors in manually carrying out the preparation of the drawings, in the raw material calculation and in the price calculation can be avoided, and that the productivity of the automatic design can be improved. A product design means stores a reference design data, and carries out an actual drawing of a pattern in accordance with the reference design data. A data management means manages a data for design options, transmits a design specification data to the product design means, and receives various data from the product design means so as to manage them. A data matching means shares the design data of both the product design means and the data management means.