Self-cultivation and Life Nourishment (Yang-sheng) is a popular topic in our modern day life. We can find a rich Yang-sheng philosophy and life wisdom in traditional Chinese Taoist philosophy, the Huang-Lao School of thought, Chinese medicine and Immortality Cult, as well as in culinary culture. The famous scholar, musician and metaphysician of the Wei and Jin Period, Ji Kang, was not only one of the leading personage of the Seven Sages of the Bamboo Groove, but also a bohemian literati, a celebrity of intellectual circles, who got influenced by the mainstream ideas of his age, like the thought of Laozi, Zhuangzi, the immortal and alchemist traditions, as well as folk religion. Besides studying these rich philosophical resources, he also integrated them into his own Yang-sheng thought. Present article attempts to reveal and discuss the comprehensiveness of Ji Kang's concept of Life Nourishment, and also to clarify the various levels of his Yang-sheng philosophy, using his essay "On the Nourishment of Life" as the principal reference material.