Examined in this article is the Dae'bu class from the Munsan-gye hierarchy system. What kind of governmental positions usually harbored this Dae'bu class, and what was the relationship between those posts and this class in particular, are issues that are essentially explored here. Positions inside the government which harbored the Dae’bu class of the Munsan-gye hierarchy system included the Jae’shin ministers, the Chu'shin figures, the Sang’seo Jwa·Wu-Bog'ya officials, the Sang’seo Jwa·Wu-Seung officials, Sang'seo figures of the Six Ministries, Shi'rang figures of the Six Ministries, Jwa·Wu San’gi Sang’shi figures, Eosa Jungseung(Jungseung figure of the Eosa-dae office), and other officials such as Pan-Biseo-seong-sa, Pan-Ye’ bin-seong-sa, Pan-Wi’wi-sa, Pan-Sa’je-sa, Pan-Tae’bok-sa, Pan-Tae’eui-gam-sa, Pan-Hab’mun-sa, Pan-Jang’jak-gam-sa, Pan-So’bu-gam-sa, Bi’seo-gam, Jeon’junggam, Ye’bin-gyeong, Wi’wi-gyeong, Sa’jae-gyeong, Dae’bu-gyeong, Tae’bokgyeong, Sa’cheon-gam, Jang'jak-gam, So'bu-gam, Bi’seo-so’gam, Dae’sa- seong & Jwae’ju figures of the Gukja-gam university, Sa'in figure of Jungseo-seong, Sang-Jang’gun and Dae-Jang’gun generals of the Heung’wi-wi guard, Boseung Jang’gun general, Dae-Jang’gun general of the Geum’oh-wi guard, Seob-Jang’gun and Dae-Jang’gun generals of the Jwa·Wu-wi guards, etc. With the exception of few cases, most of the positions that harbored the ‘Dae’bu’ class were either ministers or vice ministers of the Three Secretariats(3省), the Six MInistries(6部), offices in the league of Shi/寺 and Gam/監 levels, and generals in charge of several military guards(衛). So, it would be safe to assume that the Dae'bu class of the Munsan-gye hierarchy system was a class that was harbored by governmental positions mentioned above. During the early half of the Goryeo dynasty, positions like Ji-Mun’haseong-sa, Jeongdang Mun’hak, all low-ranking Jae’shin and Chu'shin positions, were designated as posts that were to be manned by figures who have been attending other posts as well(“Gyeom’jik”). In other words, the posts that were manned as additional duties by low-ranking Jae’shin and Chu’shin figures were the posts that harbored the ‘Dae’bu’ class. So, the Jae'shin & Chu'shin figures, or figures who were eligible for such posts, usually assumed such class. For example, the Gwang’rok Dae'bu class was assumed by officials who were either eligible for the Chu'shin seat or demoted from such seat, while the Eun’cheong Gwang’rok Dae’bu class was assumed by Chu’shin figures and the Geum’ja Gwang'rok Dae'bu class was assumed by Jae’shin figures. Considering the fact that all Jae’shin and Chu’shin figures played important roles in the operation of the Goryeo government, we can say that the ‘Dae’bu’ class was assumed by governmental officials who had huge influences upon the general governance of Goryeo. In the early half of the Goryeo dynasty, posts that shared the same rank inside the government could harbor different classes of the Munsan-gye system. People who were assigned to the same post were not granted the same Munsan-gye class all the time. Even between people who served the same post could have different Munsan-gye classes during their service, as not only the nature of that particular post but also the course of promotion an individual official displayed in his career would differ among a variety of cases. They all differed in terms of their years of service and their achievements. So, the Munsan-gye class held by individuals who were manning the same post were bound to differ, and they also advanced to the next class in their new posts.