Tongmunson, compiled in the early period of Chosun Dynasty, is a 130-volume anthology collecting works of multiple genres. Thanks to the compilers especially governmental positions at Sung-mun-won, for whom it was convenient to collect literatures, the anthology included some 14 volumes of memorials and letters（Biao-Jian）. That has a close bearing on the significance of memorials and letters in the Chosun Dynasty’s diplomacy and imperial examinations. In fact, the distinct editiorial way of memorials and letters in Tongmunson followed a previous compiling style of some collections of poems and essays, and that showed their own style: Merge entitled“biao-jian”was inspired by some Chinese reference books and Korean collected works such as Yang-Cun-ji, Han-Mo-Quan-Shu, also achieved the objective effect of maintaining the dignity of previous classics, Chosun Dynasty’s official documents such as “Jian”, etc. Under the partially influence of some compiling thinking reflected in Donginjimun-saryuk and Song-Pa-Bang, Seo Geojeong, etc. the compilers chose no title of secondary classification according to the content of memorials and letters in Tongmunson. Some details in the process of compiling embodied Seo Geojeongs’ intention to avoiding Tongmunson appeared the tendency of reference books.