The Purpose of this study is to consider the characters of reading theory in the age of Yi dynasty. Accordingly It is analyzed to the reading theory in work materials of the intellects at the age of Yi dynasty that the purpose, process and methods of reading. We have to succeed traditional reading mind that reading(learning) is life namely. Moreover We have to enlighten as to proper reading theory today. Especially we have to develop a good book lists following a grade of development what grown up spiritual mature of life.