”Zhouyi” has always been regarded by the academic circle a classic that teaches people how to see the manners of the world and survive in the troubled times without losing one's integrity, while ”Zhuangzi” has been considered the one that shows how to go with the flow and lose oneself to his own free spiritual world. Both Ji Kang and Ruan Ji were born in a time of troubles when scholars were haunted by political oppression. What was Ji Kang's worldly wisdom as a man determined to improve the world while he was continuously threatened by calamities and oppressions? The three metaphysics, ”Zhouyi”, ”Laozi” and ”Zhuangzi”, were highly popular in the Wei-Jin Dynasties, and Ji Kang was also fascinated by them. In Ji Kang's writings, the writer could see how he differed from the worldly wisdom of ”Zhuangzi” and ”Zhouyi”, and it's our intention to investigate the historical background where his problem consciousness derived from, how he merged the visions of both ”Zhouyi” and ”Zhuangzi”, how he interpreted the worldly wisdom of ”Zhuangzi” on the basis of ”Zhouyi”, and how he also took the Confucian humanistic attributes of ”Zhouyi”, which are distinct from metaphysics, as well as the divinatory perspective of religion to highlight what he admired about ”Zhouyi”.