|This article intended to find out the real operation of Kyujanggak(奎章閣) and its status by examining the document system of Kyujanggak. Though it was an important topic in terms of Joseon dynasty`s ruling operation, the document system had hardly been studied. King Jeongjo(正祖) had exerted himself in on the setup and operation of Kyujanggak since his accession and had established its document system as befits its status. A representative example of the status is the Gyoji(敎旨, appointment certificate) of Kyujanggak officers, an unique document which combined the forms of appointment certificate and Goyseo(敎書). Besides, Kyujanggak`s other documents, which were submitted to king, were made to have also the convenience the documents of Uijeongbu(議政府) and Hongmungwan(弘文館) had. Kyujanggak also could exchange documents with other offices and send to local governments directly. It was the only institute that could use the Royal seal on its name, which clearly showed the status and operation system of Kyujanggak.