The Art of War by Sun Tzu is one of the most well-received Chinese classics on a global scale, and its effect extends far beyond war. Its wisdom has been adapted to different professions in the contemporary world. Present inquiry into its philosophical ideas focuses mostly on dialectical materialism. This paper finds that the treatise is replete with Peircean pragmatic spirit, which accounts for its ongoing fame and wide applicability. It also illustrates that Peircean pragmatism and semiotic are closely related, and that Pragmatism is a subset of Peirce's logic semiotic, which the Chinese academia has disregarded for a long time.