In recent years, online "Sang Culture"as a type of Internet culture is gaining influence on the thinking patterns and value systems of Internet users, especially young adults. Its prevalence is the result of interaction between the subject and the object of this specific social practice, and the cyberspace in which online "Sang Culture"flourishes performs a variety of different functions during this interaction process. This study explores the formation mechanism of online "Sang Culture"based on the question-and-answer data from an online platform using the method and techniques in grounded theory and seeks to interpret the multiple roles of cyberspace. According to the three-stage coding analysis, the internal cause of online "Sang Culture"lies in the subjective feelings and expression needs of the netizens. Their subjective self-perception, objective social conditions, and social value orientation are contextual conditions, while the dual background of the Internet era and China's economic transformation are the intervention conditions. The study can not only help understand the multidimensional influence of online "Sang Culture"on the value system of the netizens and guide the positive and healthy development of Internet culture but also provide reference to the overall improvement of social development.