Lee-Inro(李仁老)․Lee-Kyubo(李奎報)․Choi-Ja(崔滋) is the best critic in Korea Dynasty. Choi-Ja(崔滋) succeed to Lee-Inro(李仁老)․Lee-Kyubo(李奎報). He unfolded his theory in various method. In this manuscript, I examine Choi-Ja(崔滋) s opinion on Lee-Inro(李仁老)․Lee-Kyubo(李奎報). And I examine relation, a point of sameness and difference of Lee-Inro(李仁老)․Lee-Kyubo(李奎報)․Choi-Ja(崔滋). Choi-Ja(崔滋) s theory of poem in 『Bohanjib(補閑集)』is composed of three theories- how to write poetry(作詩論), who is the poe(作家論), what level is the a poetic word(品格論). Pumkeokron(品格論) is the core of the Choi-Ja(崔滋) s critic. He divide the Pumkeok(品格)of poet into three levels. The marked characteristics of Choi-Ja(崔滋) s critic are a penetrating analysis and a romantic word. His romantic word gives the readers a sensuous impression. The Choi-Ja(崔滋) s critic promoted literary criticism to a higher position. He is the highest authority of literary criticism in Korea Dynasty.