This paper organizes the achievements of language history study of Korean literature which was published or transcribed in Youngnam province in order to explore the direction of future research. Based on the list of Korean literature of Youngnam province, organized in the first chapter, has put together a list of language history literature of Youngnam province with newly discovered Korean literature. In the second chapter, It is summarized in terms of phonology, grammar form, and of vocabulary research results that have been made until now. In Section 3.1, chapter 3 worked on research methods. It has discussed colophon analysis case and procedures and methods of body analysis. By entering the data of the body for body analysis, it is discussed to make good use of information processing program. In the process of language text analysis which is carried out in the actual research stage, it has broadly divided into three categories; phonological phenomenon, grammar form and vocabulary. The subject of each category and analytical method is overviewed. In phonological phenomenon, an example of a overcorrection associated with the palatalization, has described a method of searching for hidden meanings within the article. In section 3.2, it emphasizes theoretical foundations of general linguistics and presents three research directions by using "expansion`` as a keyword. First, a broad view to access the data. Second, the expansion of research method to take step forward in language external research from internal study of language. Third, the needs of expansion in the scope of literature documents.