This article finds that there are four main reasons which are shopping environment, perceived convenience, merchandise awareness and service evaluation influence patronage of supermarkets' consumers in China by analysis of questionnaire and analyzes on the similarities and differences of different characteristics of demography. It shows that consumers of different ages don't have significant differences in patronage reasons. However, consumers of different ages and different monthly household income have significant differences in shopping environment. It also shows that consumers in different districts have different choice standards in supermarkets.