This study examined how levels of media trust influenced the risk perception, risk acceptance, and behavior intentions of individuals regarding problems related to the Cross-Strait Service Trade Agreement. The means through which the media influences people dealing with a significant social risk issue was also investigated. In this study, a nationwide telephone survey was conducted and 1,269 samples were collected while the Legislative Yuan established regulations for the Cross-Strait Trade Agreement. The results indicated that investing trust and attention in the media influenced the risk perception, risk acceptance, and behavior intentions of individuals. The researcher believes that the media dependency and political positions of audiences are also key variables. Implications are discussed.