『Ohju Yeonmun Jangjeon Sango』 written by Lee, Gyu-gyeng is one of the most important encyclopedias in the period of Chosun-Dynasty. There are two chapters related to architecture in this book, one is 「ancestral rite·governance·human」chapter, and the other is 「architecture·human」chapter. Both of them are hard to understand because they are written in ancient Chinese and consist of various quotations in ambiguous way. This paper as a partial study is deal with the former. It makes difference between writter's original texts and quotations through textual research, and translates to modern Korean, and analyze information about ancient architecture in texts. The texts can divide to three sections. The first introduces three Chinese architectural theory books as 『Gogonggi(考工記)』, 『Yeongjo Beopsik(營造法式)』 and 『Mokgyeng(木經)』, and mentions about the prototype of the royal ancestral ritual building in 『Gogonggi Toju(考工記圖注)』. The second quotes 『Seoyeong(書影)』 to introduce 『Yeongjo Beopsik』. The third quotes 『PaePyeon(稗編)』 to introduce 『Yeongjo Beopsik』 and 『Mokgyeng』, and mentions about the counting unit of columns of the royal ancestral ritual building. Although the purpose for these quotations is not directly mentioned, but we can find it is intended to explain the architectural prototype and lay-out of the royal ancestral ritual building.