YEO KAK YUN received his BA, MA and EdD from the Seoul Nation University. After graduation, he served for four years as a Specialist in the Presidential Committees for Education. He spent five years as a researcher in the Korea Educational Development Institute. He is continuing his academic career as a professor in Korea National Open University. He has written several books and many articles in the viewpoint of lifelong education in collaboration with or exclusively. Now he works as a professor in Korea National Open University and serves as a chairman of the Board of Directors in the Seoul Metropolitan Institute for Lifelong Education.