This study focused on and analyzed the mentoring program for low income families practiced by Northern Seoul Metropolitan Office of Education, and develop the program to become an opportunity to vitalize the school library. Parents mentoring programs from five Northern Seoul elementary schools were analyzed from many different perspectives for this research. Firstly analyzed current status of mentoring program, interviewed mentor, mentee, and people in charge of these programs, were surveyed, and homeroom teachers, after school curriculum teachers were interviewed. Also the mentoring journals by mentor were analyzed. Based upon this research, school library parent mentoring program expands the role of school library, inviting the students with any possibility of being alienated from the society to the broader world by books. Eventually, this chance is to allow the small communication started out with books bring changes to the society and help to diffuse the social gap conflict in our society.