Many scholars have studied the existed situation, the major hazards, the control mechanisms and other aspects of campus network’s bad information from various perspectives, and have drawn a lot of theoretical or practical conclusions. But previous studies did not research more of its source. So, the purpose of this paper is to clarify the source of campus network’s harmful information by introducing the “Communication” concept, to construct a controlled source of bad information with “Self check”“Heteronomous check” mode by citing the classic “Gatekeeper” theory of “Communication”, and to try to present some relevant suggestions for taking the bad information of campus network under control and building a healthy network culture in colleges and universities.