本研究探討企業使用臉書溝通環境風險議題，其訊息溝通策略以及留言對公眾認知的影響，並探究環境效能以及企業偽善認知對公眾認知的影響力。實驗調查 484 位樣本發現，閱讀四組不同的溝通訊息，對於受訪者的環境外部效能以及回應效能認知產生顯著差異，但對企業偽善認知未造成顯著差異。另外，四組溝通訊息，除了公眾轉發意願，對於信任認知以及企業公民形象認知亦有不同。最後，環境效能部份正面影響公眾認知，企業偽善認知皆負面影響公眾的信任認知、企業公民認知以及訊息轉發意願。

 This research explores how companies use Facebook to communicate environmental risk issues, and analyzes the message communication strategies and public comments how to influence public perceptions. This paper also explores the impact of environmental efficacy and corporate hypocritical perceptions on public perception. The 484 samples of the experimental survey found that reading four different texts of communication messages produced significant differences in the respondents' perception of external efficiency and response efficiency, but did not cause significant differences in the perception of corporate hypocrisy. In addition, the four groups of communication messages have different perceptions of corporate trust and corporate citizenship image except of public's willingness to share corporate message. Finally, environmental efficiency partly has positive effect on public perceptions, and corporate hypocritical perceptions all negatively affect public perceptions of corporate trust, corporate citizenship, and willingness to forward messages.