This study took Gui Gu Zi the greatest political strategist in Warring States Period as the subject. This study included two topics:The theory of political strategist and how it was applied in modern times. The first part used Gui Gu Zi’s ontology, skills of mentalfathoming, the practical theory and concept of body to build the foundation of Gui Gu Zi’s own theory of political strategy. The Taoism of skill of Bai He, Yin Yang fathoming, and mental accomplishments inferred the Law of repetition, measuring, and reaction. Moreover, they could all represented by the Skill of language and behavior. Therefore Taoism, Law and Skill could infer each other but still remained three individual subjects, and reached the goal of lingual strategies matching with signs. The second part confirmed the modern value of Gui Gu Zi’s theory of political strategy by the discussion in the first part.