Focused on interpretations and new thoughts, Wang Bi's Interpretation of the Laozi is less logical than his Interpretation of the Classic of Changes but represents his thoughts. Wang has been evaluated with the merits and demerits of his metaphysics from the Six Dynasties to the Qing dynasty while contemporary scholars like Mou and Dai have deeper discussions. The study rebuilds the internal structure of Wang's entire metaphysics and reviews its advantages and shortcomings to clarify this issues contained in the Interpretations on the Laozi. Wang connects the distinction of names with the argument of actualities by metaphysical intellegence. The two are not parallell or united but have connection with each other that forms a complete doctrinal system. Wang goes beyond the original methodology, finishes his analysis of Laozi's thoughts, and continues to discuss human affairs. Both his questions and answers show how the theory can contribute to the society and real life. Mou's evaluation of Wang's thoughts as ＂methodological interpretations with little intelligence＂ is actually unfair. Wang's theory is original, rigorous, and exclusive, pursuing not the incidental but the fundamental. Refinement, peace, kindness, and mildness are important concepts of mind and spirit in Laozi's theory. They can't be included in Wang's structure so Wang omitted and simplified them. Dai's evaluation of Wang's theory as ＂an inheritance of Laozi's knowledge through the choice of existence＂ also needs to be revised. The study tries to place Wang's outstanding performance and advocation of methodology in the modern context and find the possible enlightenments it acts on the modern society