Classified Emergency Materia Medica is a pharmacopoeia published by the government of the Song(宋) dynasty. After publishment, it had a decisive effect on East-Asian herbology of China, Korean & Japan. Sakae Miki(三木榮), Tameto Okanisi(岡西爲人) wrote papers on the subjects of type, publishing process, bibliographic terms of Classified Emergency Materia Medica published in the early and middle years of Joseon Dynasty. Moreover, Sakae Miki claimed that Classified Emergency Materia Medica from China had been a standard of herbology of Joseon Dynasty since its publishment, and herbology based on materia medica from countryside(鄕藥) also had occupied a part of herbology in Joseon Dynasty. Nevertheless the specific influences, from Classified Emergency Materia Medica to the medical books of Joseon Dynasty which established the herbology based on materia medica from countryside has never been handled so far. So I would like to investigate the influence of Classified Emergency Materia Medica to Joseon Dynasty, through a comparison with literature review. The main literatures for comparison are two representative medical books of Joseon Dynasty, Compendium of Prescriptions from the Countryside(1433) & Treasured Mirror of Eastern Medicine(1613), especially focusing on the pharmacognostic parts. The main comparing points on researching literatures will be the following: publication year of books; order of herbs; and quotations. This paper will show which edition of Classified Emergency Materia Medica was utilized to publish two medical books of Joseon Dynasty, and the process how Korean herbology based on materia medica from countryside was transformed after accepting Chinese herbology.