This study observed the reading theory and the change of reading ways, so examined the intellectual attitude and the change of interests of highbrows. The reading of purpose in the middle Chosun Dynasty was for the civil service examination and making the teaching of the sages. But realists pursued the truth and the pure pleasure with realistic interest. Till the middle Chosun Dynasty, they complied with a reading way of accepting of sages words. But Sungho school(성호학파) thought important of doubting objective actuality. Yunam school(연암학파) were aware of the changeability of characters and the ambiguity of language. So they emphasized on the inside of readers. Till the middle Chosun Dynasty, required reading tought the codes of ethics and diciplines. However, the late Chosun Dynasty intended open society. A lively reception the Collection of the last period of Myoung era and the early of Chung era and reading heat changed cultural climate into emphasizing on wide reading and the erudition. Through the Chosun Dynasty, the highbrows samely doubted, emphasized on emptiness, talked about practicalism, but their aspect were different. They had different points of view in what doubting, what empty. The later highbrows regards characters as living universal natare, doughted everything, so they brought distinct reading ways and attitudes. Moreover, they rediscovered the existence of friends, carried on negotiations with the outside, amassed riches, so it enlarged scope of reading and leavened reading ways.