The author aims at studying the relationship between comments and recommendation system and online shopping behaviours. The author defines online shopping behavious as online shopping experience, online shipping satisfaction, online shopping intention and items chose. With 285 study subjects, the author uses experimental research design to research the relations between those factors. The results show that comments and recommendation and online shopping experience have positive relation. Meanwhile, comments and recommendation and online shopping satisfaction and online shopping intention have positive relation. Online shopping experience and online shopping satisfaction have positive relations with online shopping intention. There is remarkable positive relation between online shopping intention and items chosen.