As a publishing room situated in the east of Jeongyodang, it keeps engraving blocks. It has 3 units of front, 2 units of side and octagonal roof. Each wall side is made of wood panel and the floor is checkered floor to prevent moisture damage. It has space between floor and ground and make window to help ventilation. Originally over 2790 woodcuts including his literary miscellany, autographs, memoirs, Dosansipyigok, Seonjoeopil, books on strategies were kept, but for a systematic classification and safe storage along with the books in Kwangmyungsil all materials were transferred to "Korean Studies Advancement Center" on April 2003.