This article aims at reconsidering the problems existing in the cultural exchange in Eastern Asia. especially between Korea, Japan and China which might have exerted influences upon the formation and development of Korean classical literature in Hanmun from the perspectives of the literary men of late 15th century in Chosun. The major problem is about Sino-Barbarian doctrine shown politically or culturally from the three countries. Some literary men of the time did not regard ``sino`` and ``barbarian`` native, fixed or immutable, believing that they can always be reversed. The spirit considering literary superiority and morality as the true standpoint of the doctrine was deeply steeped in most Korean classical literature, Another one is about direction of reception between the countries: it was general view that literature and learning were transferred from China to Chosun and then from Chosun to Japan. The men of letters, however, looked upon the reception as mutual, not one-sided, and expected Chosun envoys leaving for Ming China to transmit their own culture in order to be of service to China, and learn Chinese resources in the interests of Chosun when returning. In that there were active and frequent mutual exchanges between Eastern countries from the 17th century on, the literary histories of the three countries appear to be thoroughly reviewed.