The essence of “Wutai Poem Case” is the game between opinion leader and public power discourse. Originally, public power discourse had absolute dominance over public opinion, but the technical innovation of the publishing industry boosted the influence of Su Shi, the opinion leader, and deepened the threat of discourse authority of Song Shenzong. In this game, Su Shi's traditional creation based on the “complain tactfully” was born with a “speaker trap” to be decided by the hearers. The Censorate’s Office took advantage of this black hole of public opinion to interpret “satirical remonstrance” as “defamation”. Although the judicial departments denied this statement, and some prestigious administrative officials also defended Su Shi, Song Shenzong used this opposition of public opinion to obtain discretion and realize the secret purpose of re-controlling public opinion. However, this game and its results had a far-reaching negative impact on the politics of the Song Dynasty, laying the groundwork for a more intense public opinion conflict.