Objectives : The purpose of this study is to infer the prescription effectiveness that have not been recorded in the existing effectiveness and to find out how to classify. Methods : The herbal compositions of bang-yaghabpyeon, the herbal textbooks and contents related to the prescription textbooks' effectiveness were entered into the database using the 'Access 2014 of the MS'. The effectiveness are inferred using query sentences. Results : The prescription effectiveness in the bang-yaghabpyeon were inferred using the herbal classification, herbal effectiveness and herbal effectiveness inferred from prescription textbooks. Conclusions : Each information of herbal effectiveness strength was extracted using the prescription textbooks' effectiveness information. These results were efficient to infer and classify bang-yaghabpyeon prescription effectiveness.