This article takes up the installation ceremonies of royal consorts during the first half of the Koryo period in Korea, that of the queen mother(冊太后儀)and that of the queen(冊王妃儀)in order to clarify one aspect of the introduction of Chinese-style rituals into Koryo society and examine the position of royal consorts as one important aspect of kingship during the period in question. In part one, the author compares the Koryo ceremonial system to the Tang period work, Kaiyuan-li開元礼, and shows that while the installation ceremony for the queen was based on Chinese institutions, such revisions as not allowing the queen or other court ladies to be present at the ceremony were added, according to the inclination of the Koryo custom of limiting the presence of women at ceremonies. Part 2 turns to the rituals surrounding the installation of the queen mother and reveals that the queen mother wielded more political authority than the queen as indicated other non-ritual related evidence. In addition, the queen mother's installation ceremony, which was introduced in 1086, was done so under the foreign influence of the Song dynasty and its own queen mother installation ceremony. This also marked the first time since Guang-jong光宗, when queens began to be chosen from the royal family, that a member of another aristocratic family was named queen mother. It was in this way that the queen mother's installation ceremony was introduced in order to demonstrate in a ritual manner her influential political position in Koryo society.