The government of PRC has taken clearing down the chaotic phenomena in the fandoms as one of priorities in the internet regulation because the activities of online fandoms generate numerous negative effects. The online fandoms, as a new type of social organization with more and more remarkable influence indicates their powerful mobilization. The online fans community organization, differing from three types of organizations argued by scholars, such as bureaucracy, network, and concentric circle organization, presents distinctive characteristics both in organizational structure and mobilization mechanism: the explicit organization purpose and incentive mechanism with the flexible group boundaries; as an single-power central organization with the characteristics of horizontal transmission by network connections; mobilized the members by emotion while the social relations of them being weak. In the article, we figure the fandoms as the “drop-shaped” organization in which demonstrates the interactions among different kinds of members in the organization. The core members and ones at the middle-level of the online fandoms, driven by the rational calculation of interests, play the roles as the mobilizers by inspiring the multiple emotional demands from the normal fans. The commercial capitals, especially those from the giant internet companies, regard operating the fandoms as one of tools for profit. What else we need to pay attention to is that the members at the middle-level are divergent in pursuing diverse interests, which can help us to understand why some of them may play a role contrary to the wills of the idols. Finally, the article also sheds light on the governance for platform since the platform is not only the object of the governance as the manipulator of the chaotic phenomena in the fandoms, but it can play the role of the autonomous tool for governance.