10. A method for displaying a data search result comprising the steps of: representing a result of a data search based on certain search criteria as a set according to each of said search criteria; converting each of said sets to an n-polygonal image having an area corresponding to the magnitude of element count of each of said sets and a relative relationship in position among said search criteria, wherein converting each of said sets to an n-polygonal image comprises repeating a convergent calculation for drawing under certain restricting parameters, wherein said convergent calculation is initiated under restricting parameters where a convex polygon appears, and if said convergence does not appear as a convex polygon after repeating a certain number of times, the restricting parameters are switched so that a concave polygon appears; and displaying each converted n-polygonal image on a predetermined display device, wherein each of the multiple n-polygonal images is displayed within the same display region while maintaining a relative relationship with other n-polygonal images based on said search criteria.
12. A method for displaying a data search result according to claim 10 , and further comprising the steps of: obtaining each of said n-polygonal images under a plurality of search criteria where only a time-frame element is different is stored; and simultaneously displaying said n-polygonal images at different time frames in the same coordinate system on said display device.