Facebook, Twitter, WeChat and the other social network take "people-gathering" as the biggest dividend. Through the sharing of users' information, images, mood and so on, the social network transfer the offline non-contact social interaction onto the network, so that brands have more channels for "fans marketing". Social network "topics", communities, viruses-like spreading model enhance not only the popularity and the reputation of the brand, but also the consumers loyalty, consumers brand preference, and thus the brand value. In this paper, the promotion path of the value of brands in the social network service is taken as the focus.