Live webcast has gotten involved in our life step by step and has significantly influenced consumers‘ purchasing decisions. However, few existing studies have shade light on whether a female commenter's characteristics, especially whether her makeup influences the credibility of her comments. To fill this gap? this study investigated whether a commenter's makeup (vs without makeup) influences the credibility of her comments based on heuristics and system models. Through four experiments' this study found that the comments from a commenter without makeup (vs with makeup) are more convincing when consumers watch live webcast, and perceived autonomy of the commenter exerts a mediation effect, In addition, this study also found that the type of live webcast (entertainment vs?? learning) moderates the influence of whether a commenter without makeup (vs?? with makeup) on the credibility of her comments. The findings of this study not only enriches the research in the field of wordˉofˉmouth, but also provides reference to enterprises for designing promotion and channel strategies.