BBS(Bulletin Board System)plays an important role in network communication, and includes several functions to satisfy the need of BBS users, such as E-mail, chat, post and reading articles. This research used "Theory of Agenda Setting" to discuss the relationship of media issues and personal issues in BBS.
In this research we found BBS, a new media,have agenda setting effect and the frequence of the media use could make the agenda setting effect difference.