In the invention, there are included a first image generating that generates image data corresponding to a shape data of a machining target as machining target image data, a second image generating that generates, based on NC programs created in the past, image data of a machining finish shape as finish shape image data, a storing that stores the finish shape image data associating with an NC program corresponding thereto, a similarity calculating that compares the machining target image data and the finish shape image data to calculate similarity of both the image data, a searching that searches, based on the similarity, candidates of finish shape image data similar to or matching the machining target image data and displays the candidates, and a first program displaying that displays, out of the candidates of the finish shape image data, an NC program for designated finish shape image data.

A computer-implemented automated building mechanical systems design and modeling is described. The system provides a central source for all of the design and construction information for systems in a construction project in a coordinated two-dimensional and three-dimensional spatial database that is accessible as a means to produce automatically coordinated design development and construction document information of the mechanical systems. The system acquires and stores all of the appropriate design, engineering, and construction expertise information available for any building type for use in automatically assembling and coordinating the design, cost-estimating, and scheduling for the mechanical systems of the construction project. The system output model enables automatic generation of drawings and cost, manufacturing and scheduling information.