the network public event is not the network provoked event，but a reflection of realistic problems on the Internet. Prominent social contradictions are the main reason. While the diffusion and aggregation of the network help it out.Emergency lights the social emotion，which forms explosion point on the network rapidly. This is how a network public event forms.One is that rising，social contradictions highlight social risk；on the other hand is the formation of independence and equality of the network public space.In this case，variation of the network public events will become inevitable.To make people understand the right and wrong of events is a basic principle of calming events，and to resolve social risks is the key to respond to network events.