To provide a low-cost and fast visualization method that enables efficient distributed processing maintaining total integrity of object motion when displaying a moving three-dimensional object on a large screen by CG.

The method for generating a two-dimensional image to visualize objects moving in a three-dimensional space divides a two-dimensional image of the final target into a plurality of local images, divides the three-dimensional space to be visualized into a plurality of local spaces, assigns one local space to any one of a plurality of prepared computers as an assigned local space, commands each computer to visualize only the object in the assigned local space to produce a total of a plurality of local images, and synthesizes the plurality of local images to produce one final large two-dimensional visual image.