The meaning and scope of sociology of education are unclear, even to sociologists of education. Therefore, we need to deeply review the meaning, the scope, and the identity of sociology of education in order to invite students to this area, guide young scholars preparing research projects, and team up with colleagues. I tried to zoom in and out to clarify the scope of the area. First, I compared analogous terms education, training, and indoctrination; education and pedagogy(science of education) etc. being used in the area. Second, I explained the theoretical foundations of education, including history, philosophy, sociology, and psychology of education and other areas of pedagogy, such as curriculum and instruction, educational administration, educational evaluation. Third, I emphasized the necessity of interdisciplinary study with the areas of curriculum and instruction, administration, comparative education, and social psychology of education. Fourth, after historically reviewing the sociology of education in UK and USA I explained the trend of the area in Korea. Finally, I emphasized the necessity of expansion of theory and topic, interchange with other areas in education and social sciences, and consideration about educational field such as schools and other educational institutions.