Jejumok-Gwana Government Office was located near Gwandeokjeong Hall (Treasure 322), and used to be an area where government offices were located. From the Tamnaguk to the Joseon Dynasty, the Jejumok-Gwana served as the center of administration in Jeju. As a result of four excavation investigations carried out from 1991 to 1998, the remains of 30 buildings were found, including vital buildings shown in documents such as Honghwagak, Yeonhuigak, Uyeondang, Gyullimdang, and Yeongjuhyeopdang. 45 Pilji (a unit measure for land ownership) of 22,391 ㎡ of land was designated as Historic Site 380 over 2 courses on March 30th, 1993 and July 6th, 2003. After 10 years of excavation work, the first restoration project was finished in December 2002, and 8 buildings including Honghwagak, Yeonhuigak, and Oedaemun Gate were restored. They are the only restored government buildings from the Joseon Dynasty in Korea.