This study originates from the question on what kind of factors created Koryo celadon and it analyzed such factors from the perspectives of technique, production (fund) and demand related to pottery manufacturing. The results can be summarized as follows: It is widely known that Koryo celadon was created based on the celadon manufacturing technique of the Yue kiln(越窯). More specifically, it dates back to the 940s, immediately after the unification of the Later Three Kingdoms by Koryo and it is assessed that many potters of the Yue kiln moved to Koryo at that time. The biggest question on the “spread” of the Yue kiln techniques throughout Koryo is why at this particular point of time the Yue kiln potters came to Koryo. It is understood related to the assumption that they were the people engaged in the pottery business in the Yue kiln after moving to the Zhedong(浙東) province in China from the Korean peninsula or theirdescendants. In other words, it is considered that the potters came back to Koryo right after the unification of the Later Three Kingdoms of Korea and spread the Yue kiln techniques in Koryo. It has been mentioned that the government and the powerful local gentry(豪族) of Koryo Dynasty are the main agents who “embraced” the celadon manufacturing technique of the Yue kiln, built kilns and produced celadon. However, it is hardly convincing given the analysis on the grounds for the opinion that the Koryo government led the celadon production. It is rather highly possible that the powerful local gentry, the influential forces in late Silla and early Koryo period, embraced the Yue kiln potters of Korean origin, established kilns and made celadon. Moreover, considering that the kilns for “early celadon” of Koryo scattered over the Middle Western province, the leader would have been the powerful gentry of the province. In other words, it was the powerful local gentry of the Middle West province who led the creation of Koryo celadon from the perspective of production (fund). Meanwhile, with Zen Buddhism in fashion in late Silla period, the Buddhist monks emerged as a new group of enjoying tea. Thanks to the policy for Buddhism by King Taejo right after the establishment of Koryo, the number of the monks increased significantly. They were the biggest potential customer group of Koryo Celadon and drove the creation of Koryo celadon in terms of consumption. In this sense, it might be only natural that Koryo early celadon production was focused on tea-related wares such as tea bowls.