The bus rapid transit service has been implemented in Shaoxing for five years. Whether people are satisfied with the BRT service and what kinds of factors attribute their judgement address my attention. Taking socio-economic characteristic of passenger as well as subjective and objective perception characteristic of BRT service into consideration, this paper aims to establish a user satisfaction model for BRT service and figure out whether frequency of riding BRT or public bus have impact on level of satisfaction. The estimated model show that (1) objective perception characteristic of BRT service has dominant influence on user satisfaction; (2) frequency of riding BRT and public buses is positively associated with user satisfaction; (3) people with lower income more likely have lower satisfaction while company clerks are more satisfied with the BRT service than other occupation.