This paper is an attempt to establish the identity of parental studies and to establish theories. For this purpose, this study reviewed the literature on parents and analyzed Graduate School Curriculum in K university. Based on the analysis, the research subject and the research boundary of parentology(the parental studies as an academic discipline) were examined. The subject of the parentology was divided into three areas. They are ‘study of parents’, ‘study for parents’, and ‘study by parents’. The first one is the study to explore relations among the presence, behavior, and the environment of parents. The second one is the study to establish parents’ identity and to realize the right of education of parents. The third one is the study by parents themselves, the subject of education. Parentology should be a study that reveals the reality of the parents and the phenomena related to the parents. At the same time, it should have educational meaning and value from the perspective of the parents. Therefore, the boundary of parentology is divided into 5 themes. They are the substance of parents, the role of parents, the behavior of parents, the parents supporting, and parents policy.