The aim of this study was to find out the time when the Araliae Continentalis Radix and Osterici Radix were classified into different divisions as the period were not known to oriental medical science in Korea. It could be said that the Araliae Continentalis Radix and Osterici Radix had been recognized the different shapes since Sui-Tang eras and they had been differently used in their shapes and effects as separated medical plants since Song-Yuan eras. This thesis also presented the effects and shapes of Araliae Continentalis Radix and Osterici Radix as well as showed prescriptions and the uses of them in each dynasty of China.