Abstract: Jin Yuelin established his own metaphysical system in his treatise On Dao.The methods used in this system include synthesis and analysis,and the analysis tools are mainly the methods of modern logic.The modern logic here mainly comes from Principia Mathematica and A Survey of Symbolic Logic.The establishment of the metaphysical system in On Dao,not only put forward a modern form of metaphysical theory for Dao,the most lofty concept in Chinese culture,but also provided an ontological basis for Jin Yuelins answer to “Humes Problem”.Therefore,The book On Dao not only strengthened the logical and epistemological consciousness of Chinese philosophy,thus becoming the peak of the development of Chinese philosophy since Neo-Confucianism of Song and Ming Dynasties,but also embodied Jin Yuelins attitude of treating philosophy as a universal human discipline.

Key words: On Dao, metaphysics, logic, causality