The meaning of "health master" is the main key to health. This article aims to explain the way of keeping in good health. The author believes that human society is complex and human life is limited. Living in such a complicated society, we should conform to the way of nature and regard it as a normal law of life. Don't pursue fame for good, don't be punished and humiliated for evil. He is good at avoiding all contradictions and right and wrong, "entering a room without thickness" and living his life in the cracks between right and wrong. Only in this way can you "protect yourself", "live a good life", "raise your loved ones" and "do your best". This way of keeping in good health is actually developed from Laozi's thought of "being satisfied with enough and not humiliating, being content with risks and lasting for a long time", which embodies Zhuangzi's thought of avoiding harm all his life.