In this study quality of tobacco cessation information provided through Internet web sites was evaluated in terms of retrievability, easy of use, user-supportiveness, feedback, and continuity. This study limited to those internet web sites developed and delivered by Korean public health service organizations or their related institutions or associations. This study analyzed 8 internet web sites and evaluation criteria developed by Chung, Yong Chul (2002) and Yoo, Sarah (2001) were used. Study results indicated that retrievability was evaluated low except search-speed of data: the easy of use was evaluated moderately: user-supportiveness was evaluated moderately: feedback, and continuity of those sites were evaluated low. The quality of tobacco cession information of those sites are needed to be improved. The development of guidelines for standardized health information on Internet web sites is necessary, too.