Choi Hae(崔瀣) is a rising bureaucrat in the early fourteenth century Koryo(高麗). Choi Hae passed the state examination following his father and took a chance by which he can live peacefully as a bureaucrat. But he experienced a first frustration in his life that prevented him from entering into government. Office by getting involved in Sungkyunhakyu(成均學論) recommendation affair linked to his father. When he became Twenty, his farther was set free and was re-appointed as Sangjumok(尙州牧) Tongpan(通判). Therefore he also entered into government as Yemunchunchuguan(藝文春秋館) Kymyeul(檢閱). But he was involved in unfortunate affair again. He was relegated and worked as Jangsahyun(長沙縣) Kammu(監務) over three years. Since he came back into Kaekyung(開京), he wandered from place to place in central government for ten years. When as Janghungkosa(長與庫使) he was thirty three, he was elected as an applicant who can sit for a state examination of Yuan(元) passed it. Consequently, he could parade his learning and literary reputation, when he reached the peak of his life. But he resigned a government office of Yuan and returned to his mother country, seemingly because the office was insignificant and not fitted his aptitude but virtually because he opposed enthroning of Sim Wang(瀋王) that was swirling Koryo politics. Since he returned to Koryo he mainly worked as literary officer and finally retired in Sungkyuntaesasung(成均大司成). In those days, a person who passed the state examination of Yuan was prompted to a higher position and mostly reached into minister or royal secretary but he did not so, because he was lacking in worldly wisdom and was disgusted with politics connected with several frustrations from taking office. After the retirement, he did not lose pride as a Confucian in spite of poverty and started writing of books including, edition of selected works of classics. His writing activity is wider than any other person’s one. Choi Hae served Kim Kae hyun(金台鉉) as a master and associated with several persons including lee Je Hyun(李齊賢). Chou Hae recognized those days as the end of the world when saints disappeared and had concrete consciousness by which he reflect himself in the light of their teachings. Also he evaluated integrity highly and had strong antipathy against the powereful. He had strong self-consciousness as the gentry, but had not firm statesmanship. In the meantime he evaluated Confucianism more highly and recognized Buddhism as heresy on the ground of Dichotomous attitude. He was critical to social phenomena that resulted from faith of virtue but was affirmative to the function of faith itself. Choi hase had the pride of so-called little Chinocentrism, before interference period by Yuan, that Koryo’s civilization could flourish through the the relation of submission to the stronger, China, Behind this view, there was a dual attitude that our cultural standard was lower that Chinese one. He recognized Yuan as the successor of Chinese civilization, and had not autonomous attitude insomuch as he understood autonomy which Koryo defended during the interference period of Yuan as the result of favor from Yuan.