The aim of this study is to investigate the relationship between bystanders’ perceptions of workplace bullying and turnover intention, as well as the mediating effects of psychological safety and emotional exhaustion. This study used convenience sampling to collect data from companies in Taiwan. The survey gathered 273 valid samples and the response rate was 88.64%. The results indicate that bystanders' perception of workplace bullying is positively associated with turnover intention, and the emotional exhaustion fully mediate the relationship between workplace bullying and turnover intention. However, psychological safety, is not a significant mediator in the relationship between bystanders' perception of workplace bullying and turnover intention. Finally, implications for this research and practice were discussed.