Public opinion polling has become the best space for representing people's opinions. The media discourse of polling reports reflects questions regarding media representation and construction of reality. That is to say, how media (or politicians) use publicity and discourse to construct "public" opinion and "reality" is really worth discussing. Therefore, this paper adopts a critical linguistics approach to analyze the meaning of discourse in public opinion polling reports. The results of this paper conclude three types of polling discourse formats: 1. using majority/minority discourse to construct generalized or polarized opinions; 2. using hegemony and articulation discourse to construct "main stream" opinions; 3. using percentage and causality discourse to construct "real" and "objective" opinions.