The governance of online rumors and false information has basically formed three main ideas of research on false information self-system，government control and governance system research and false information association system. Each system has three parts from information content，control model and derivative influence to develop. Security issues and violations of rights in the Internet field are gradually exposed，and its management norms are gradually moving from “industry self-discipline” to “legal and government regulation”. The provisions of the criminal law are all related to the regulation of false information，but there are differences in the applicability，and the identification standards，regulatory scope，judicial boundaries and government status need to be carefully discriminated. Through the analysis of the information data of the three major rumor-removing platforms during the New Crown Epidemic Situation，the trend and characteristics of the generation and evolution of false information on the Internet during public health emergencies were found. Putting the observations in the context of the era of Truth Decay，the writer hopes to introduce the “System Complexity” theory to re-examine the governance of the network false information and its operating mechanism.