The atlas data base system for chemical constituents of Chinese traditional and folk medicine is the first one for single crystal structure in China. It includes about 250 crystal structures of chemical ingredients of Chinese traditional and folk medicine. It has searching, plotting and computing functions. It is a useful reference base. All softwares are written in dbaseIII, FORTRAN and Assembler Languages. They can be run on PC-286,386,486 and their compatible microcomputers.