| 1975.12 | Department of Library established |
| 1978.03 | Professor Gong-Chul Sa hired |
| 1979.03 | Professor Soon-Ja Lee hired |
| 1980.02 | First class graduated (28 graduates) |
| 1983.03 | Professor Hee-Jae Lee transferred and hired |
| 1983.10 | Library Studies in the Graduate School and Librarian Studies in the Graduate School of Education established |
| 1989.02 | 10th graduating class (52 graduates), a total of 389 graduates in the major |
| 1991.03 | Professor Sung-Hyuk Kim hired |
| 1992.01 | Renamed to Department of Library & Information Science |
| 1995.03 | Professor Chun-Sil Lee hired |
| 1998.03 | Transferred from the College of Liberal Arts, Department of Library & Information Science to College of Science, Department of Information Science Professor Gyung-Mook Oh hired |
| 2001.02 | Professor Soon-Ja Lee's honorary retirement |
| 2001.03 | The digital publication affiliated major program established |
| 2002.02 | Professor Gong-Chul Sa's honorary retirement |
| 2003.11 | Selected as Excellent School in the field of library & information science by the Korean Council for University Education (Excellent University in Specialization) |
| 2004.03 | Retransferred from the College of Science, Department of Library & Information Science to the College of Liberal Arts, Department of Humanities |
| 2004.09 | Professor Yoon-Geum Jang hired |
| 2005.03 | Professor Hee-Jae Lee appointed as head of the department |
| 2005.11 | Held "Alumni Night" in celebration of the 30th anniversary of department establishment |
| 2006.03 | Doctoral program in the Graduate School established |
| 2006.08 | Hosted the IFLA 2006 Seoul's Library Theory and Research session; Sookmyung University Library chosen as the visiting library (Professor Chun-Shil Lee, head librarian) |
| 2006.09 | Professor Hee-Jae Lee appointed as Dean of the College of Liberal Arts, Professor Yoon-Geum Jang appointed as head of the department |
| 2006.11.9 | 30th anniversary of department establishment events, 30th anniversary (link) |
| 2007.10 | Opening event for renovated practical training room |
| 2011.02 | Total of 1,118 graduates since the department establishment |