Upon reviewing human history, the appearance of the great epidemic situation nearly all correlates with animal's etiology, such as the ”SARS storm” which shocked many countries two years ago. It was finally verified that this mankind's great injuries and deaths incident was caused by the variation and recombination of animal's etiology. With the trend of global liberalization at present, international tourism and agricultural and animal products are frequent traded day by day, and combining with the factor such as frequent climate changes and natural disaster, it is more difficult to grasp common infectious disease of people and animals in various countries. In view of this, Chinese herbal medicine is seeking new method for regulating immunity and defending virus. The Chinese herbal medicine derived from our ancestor will be the natural antibiotics to substitute synthetic antibiotics, and chemical additive. It can cure the disease and is not afraid of the resistance of drug, the residue of harmful ingredient is low. It can be regarded as the new favorable turn of clinical medical treatment, and it is also a great good news.