This report describes the studies as follows through the research into the data of Rhizoma Atractylodis japonicae blended prescriptions from Bang Yahk Hap Peun. The main pathologies of Atractylodis Japonicae blended prescriptions found chills, bowels, malaria, and they are used 18 disease also. In these prescriptions, the symptoms of chills and bowels are the most frequently used. Atractylodis Japonicae main blended prescriptions use in the symptoms of Sang Han Pyo syndrome, Sang Han Yin syndrome, and they are 25 disease also. Through the research, Atractylodis Japonicae main blended prescriptions are used the pathologes of wet, internal disease, the injury of the cold and wind, stomach and spleen. The actual amount of Atractylodis Japonicae blended has a wide capacity from 6 pun to 6 don, 1-2 don is broadlly used. The structures of Atractylodis Japonicae blended prescriptions are Pyong We San, Yi Myo San, Hyang So San, Warl Gook Hwan, Gook Chul Hwan, such as basic prescriptions are most used.