To encourage users’ engagement and crowdsource quality control, many online communities provide users with peer evaluation votes. By using a total number of 17,178 online hotel reviews from Yelp, this study explored the factors influencing hotel review peer evaluations. The empirical results show that (1) multiple motivations exist for peer evaluations of online reviews; (2) except for reviews’ post date, length, and hotel popularity, readability of hotel review has positive influences on evaluation votes; (3) review sentiment has stronger influences on evaluation votes than other factors; (4) the effects of hotel review sentiment and readability on peer evaluation votes are positively moderated by reviewer’s social identity and social network.