As for the social management departments and internet public opinion service institutions' judgement and warning of the internet public opinion，they need to discriminate the identity of the public opinion spokesman. The spokesman of different purpose and different identity hierarchies result in different social status，therefore，have an impact on the discourse right，even lead to the discourse barriers.Especially the existence of “Web Spammer”，it's difficult to discriminate the identity.All of these require the researchers to strengthen their consciousness of the responsibility and ensure the objective truth of internet public opinion warning interpretation.