In 2007, Facebook launched "fan page" platform, many companies are running their own social commerce on this page, and not only effectively improve the exposure of their own brand but also get the most real and rapid feedback by having interaction with community members on Facebook fan page. Correlation analysis and multiple regression analysis was used in this study to empirically analyze factors affecting the performance of the social commerce organizations. The research context of this study is a surrogate store based on Facebook. The results show that advertising expenditure is positively and significantly associated with profits and number of purchasers while commodity price is negatively correlated with the abovementioned performance indicators. Additionally, number of product items has a positive impact on number of purchasers but slightly significantly associated with profits. Furthermore, this study explores the mechanism through which advertisement and commodity attributes influence profits and number of customers. The results show that the positive relationship between advertisement and sales performance is mediated by the engagement of users.