Hongmungwan (弘文館) was a central government office of the Joseon (朝鮮) Dynasty that existed from 1463 to 1907. Hongmungwan was responsible for managing court books, handling documents, and responding to the king’s inquiries. This study aimed to understand the scale and nature of the books held by Hongmungwan. An analysis was conducted on the existing Hongmungwan book catalog and 618 types Hongmungwan books held at the Kyujanggak Institute for Korean Studies. Among the 618 types Hongmungwan books, 451 types (73%) were published in Korea, and 167 types (27%) were published in China. By subject, there were 112 types in Gyeongbu (經部), 138 types in Sabu (史部), 112 types in Zabu (子部), and 254 types in the Jibu (集部). From the perspective of printing methods, there were 433 types woodblock prints, 129 types metal type prints, 30 types wooden movable type prints, and 26 types manuscripts. Many books were published between the 17th and 18th centuries, and most of the books remaining today in the Hongmungwan appear to have been collected during the reigns of Injo (仁祖) to Sukjong (肅宗).