At the dawn of modern Korean literature, deviating from phase of ``patois`` dialect began to be used as literary language. we can ascertain the consciousness to dialect in the period of Imperial Japanese through literary works, mentions of writers, dispute about literary language or standard language at that time. The writers used the dialect for reality, geographical background in works, national culture and tradition(history and culture of region, local color and customs), expansion of vocabulary, finding of new poetic language, expression of ideology, aesthetics etc. Novelist Kim Dong-in and Kim Nam-cheon commented about dialect in the point of culture of region, local color and local customs, expansion of vocabulary. In referring to the establishment of standard language, the intellectuals generally differentiated dialect from patois. The one part asserted to establish standard language under the basis on Seoul middle class dialect, the other part asserted to establish on the consideration to various regional dialects. And Korean linguists thought that dialect was very important to study Korean history. As writers hold on to above consciousness and attitude to dialect, they used their native dialects in works. Meanwhile, The dialects in works are precious to study Korean history and dialectology. But when we are going to utilize these dialectal materials for study, it needs to do textual approach, to examine to be modified or not by writers. We must ascertain that dialects accord with the scene in the works or not, and also need linguistical analysis to the dialects.