"The purpose of this study is to suggest methods for exploring study subject in order to help researchers' study. For this purpose, nature of article(namely definition and type of article) and methods for exploring study subject(methods for exploring study subject based on the matter of individual interest on a major field of study, the individual past experiences, the observation on matters of everyday life, the knowledge systems, the social demands on the problem solution, the accumulated ideas, and the researches trend) were discussed through extensive literature review and researcher' experience. Key Words: study subject, type of article"