This paper studies the main treatment methods, Ikgi(益氣) and Seung-yang(升陽) applied frequently by Lee Jema(李濟馬) on the exterior disease of So-eumin(少陰人), one of the four constitutions. The methodology of this paper is to understand the pharmacology of "Dong-uisusebowon(東醫壽世保元)" by examining the formulas applied by Lee Jema. I have examined the organization of formulas in "Dong-uisusebowon(東醫壽世保元)" beforehand to categorize the formulas applicable in this study according to an objective standard. I have analyzed the prescriptions applied to So-eumin exterior disease. As a result, I could see that in the case of Ulgwang(鬱狂) syndrome, Ikgi(益氣) and Seung-yang(升陽) methods were mainly applied, but as the disease progressed, Seung-yang(升陽) was withdrawn while Ikgi(益氣) was stressed. Likewise, in the case of Mang-yang(亡陽), both methods were mainly adopted, but as the patients got worse, the level of Seung-yang(升陽) was maintained and that of Ikgi(益氣) was elevated with the addition of Buja(附子). Through this process, we could verify the overall action of Ikgi(益氣), Seung-yang(升陽) and Buja(附子). Originally, the two methods of Ikgi(益氣) and Seung-yang(升陽) are intimately related, but by analyzing the overall functions of the two methods, we could see that Seung-yang(升陽) and Buja(附子) support the Yang gi of the interior of So-eumin, while Ikgi(益氣) resolves inner stagnation of Yang gi and emits the cold pathogen of the exterior. Also, in the course of treatment, Ikgi(益氣) could only be realized after securing Seung-yang(升陽).