The international raw silk grade classification method has been amended for several times since it has been created in 1932. S쳐h rather periodical changes have been raised as problems not because of it was created by scientifical research background or academical base but because of rather commercial aspect. This paper is, however, discussed by throughful academical aspect regardless raw silk sailers or buyers commercial interest. After carring a theoretical approach with thoroughful investigation on this matter, this paper happened to compare the current raw silk grade classification method against the developed theoretical silk grade classification method, which they happened to be much different each other. (omitted)