[目的/意义]网络负向情绪能促使网络舆情危机爆发，而网络情绪本身是网络用户对舆情事件的情感反 应，但舆情事件特性如何影响个体初始的负向情绪强度和情绪类型还缺乏深入探讨。[方法/过程]采用情境模拟 实验法，以两个实验分别探讨了事件危害性、事件责任、事件不确定性等特性对受众初始情绪状态的影响。[结果/ 结论]事件责任和事件危害性对负向情绪强度有正向影响，而在舆情事件责任大小与事件不确定性高低的不同状 态下，受众表达的愤怒、恐惧、焦虑以及悲伤等负向情绪类型存在不同。

[Purpose/significance] Online negative emotion is an important factor to promote the outbreak of online public opinion events. And online emotion itself is the emotional response of online users to public opinion events. How⁃ ever, how the characteristics of public opinion events affect the negative emotion intensity and emotion type of individu⁃ als is still lacking of in-depth discussion. [Method/process] Two experiments were conducted to explore the impact of characteristics such as event severity, event responsibility, and event uncertainty on the initial emotion of the audience. [Result/conclusion] The results show that the responsibility and severity of events have a positive impact on the of neg⁃ ative emotion intense, and anger, fear, anxiety and sadness of the audience are prevalent in different situations of public opinion event responsibility and event uncertainty.