These are daily journals written in Seungjeongwon (Office of Chief Secretary to a King in charge of royal commands), recording all the incoming and outgoing royal documents on various issues. These journals were written by 6 Secretaries of Upper 3rd Level and 2 Clerks of upper 7th Level; A Chief Secretary was in charge of documents of the Ministry of Personnel Affairs; a First Deputy Secretary, the Ministry of Defense; a Second Deputy Secretary, the Ministry of Finance; a First Assistant Secretary, the Ministry of Culture; a Second Assistant Secretary, the Ministry of Industry and a Third Assistant Secretary was responsible for the documents of Ministry of Justice. Clerks put the documents in record, in which temporary clerks filled in when the clerks were not available. Special documents on war situation were recorded by a temporary clerk for national emergencies. The journals continued from April 12th, 1623 to August 29th, 1910 for over 280 years, undergoing the changes in the name of supervising office and even the title of the journals in the course of the time. These journals consist of a total of 3243 volumes, with 393578 parts, chronologically listed; typically, records for a month made up a volume, though some months had two volumes depending on the amount of records. The journals had served as the primary source to historiographers working on Joseon wangjo sillok (The Annals of Joseon Dynasty), and they have been highly praised for a thorough recording of the entire picture of Seungjeongwon, a pivotal office in a royal court, taking care of not only important national events but also simple routines as well.