Both Laotzu and Chungtsu are representative figures of Taoism. Chungtsu generally inherits Laotzu's concept of Taoism while he use "Tien" instead of "Tao" to present Taoism. "Tien Tao" is the original of the unlimited and extensive universe, which implies nature and non-interference. Transferring Tien-Tao to human activities forms their specific philosophy of life. Due to the difference of environment in which they live, they had developed different philosophy for action, even though both are representative figures of Taoism. Both of them preferred using water to express their point of views. Loatzu thought the characteristics of water are so closed to Tien-Tao that he liked to use water to present the virtue of Taoism. This article will discuss their attitude of action by referring the instances of water in books "Laotzu" and "Chungtsu". Laotzu thought water's characteristics like "benefiting all lives", "staying at place everyone hates", "no striving", and "weakness" are presentation of Taoism. He thought people should take those characteristics as rules for their daily actions with which people are ale to reach the natural and non-interference status of Taoism and keep people at a place of undefeated. On the other hand, Chungtsu use still, clear, and mirror-like water to express the shape of virtue. He used crystal and pure water to describe spiritual status and use flowing water to describe the nature and the non-interference characteristics of virtue. By analyzing how Chungtsu used water to illustrate Toaism, we conclude the philosophy of his life was mainly to inspire human virtue and promote people's spiritual status. Because of the different way and attitude they took to express Toaism, Laotzu's thoughts were eventually developed and used by deceitful officials while Chungtsu's were very helpful for inspiring natural intelligence and preferred by retired scholars.