In ancient Chinese civilization, astronomy, mathematics, agriculture and medicine were the four advanced sciences. Maybe it is improper to call them sciences, but they were really the four complete systems of knowledge and skills developed in ancient China. Among them, medicine is the only one that has never been replaced by Western sciences and still plays an important role in protecting the health of Chinese people. Then there is a question. How traditional Chinese medicine, a classic system of medicine without any connection with modern sciences, can still exist in spite of the fact that modern medicine can basically meet the need of healthcare? Is traditional Chinese medicine a science or just a collection of experience? Does it still have the possibility and space to further develop itself along its own orbit? Is there any possibility that it may be replaced by modern medicine? There are the questions frequently being asked.