Objective : In South Song era, Choe Ga-eon(崔嘉彦) built Seowonam(西源庵), lived as a hermit and communicated with Juja(朱子) in LuShan(廬山), JiangXi province(江西省), JiuJiang city(九江市). Maekgyeol(脈訣) written by him significantly influenced the forthcoming medical doctors, who took over his studies and were called the school of Seowon. Little information about his life and his successors encouraged this study. Method : The core contents of Maekgyeol(脈訣), his life based on Waryongamgi(臥龍庵記) and Seowongamgi(西源庵記) written by Juja(朱子) and his successors on the basis of various medical books were investigated. Result : The Seowonam(西源庵) is located at the entrance of xiufeng Scenic spot(秀峰景區) which is 6km west from center of Xingzi county(星子縣), JiangXi province(江西省), JiuJiang city(九江市). The points of Maekgyeol(脈訣) are inferring the symptom of wind, energy, cold and heat by categorizing seven exterior and eight interior pulse into four pulses of float, sink, slow and quick and diagnosing a disease of three warmer and the five viscera and the six entrails by subordinating four pulses to Chon, Gwan, and Cheok(寸關尺). By writing the book of Sawonron(四原論) he clarified the clinical point, pulse, disease, symptom, treatment with learning the cause of a disease through pulse, understanding the symptom through a disease, and giving a remedy through a symptom. Then he communicated with Juja(朱子) assigned to NanKangJun(南康軍) as a ruler. He helped Juja(朱子) to build Waryongam(臥龍庵) and Juja(朱子) wrote Seowonamgi(西源庵記) for him. Conclusion : The members of medical doctors of the school of Seowon were Choe Ga-eon(崔嘉彦) and his follower Yu Gae(劉開), Yugae's disciple Eom Yong-hwa(嚴用和) and Ju Jong-yang(朱宗陽) and Ju Jong-yang's disciple Jang Do-jung(張道中). They, who were famous for pulse, had contributed to advancing study of pulses in the field of oriental medicine.