Scientists have found through numerous studies that about 10% of tumors in the body will subside naturally, and once they subside, they rarely recur. The American Cancer Society further researched that the fundamental reason is that there is a strict tumor defense system in human body, and when this system is activated, the body’s independent anti-tumor program will start, and the tumor will become softer, smaller and even disappear. Biological therapy, as the fourth mode of tumor treatment after surgery, radiotherapy and chemotherapy, can stop tumor growth by regulating the body’s own defense mechanism and realize the patient’s own body’s “independent anti-cancer”, so as to inhibit or eliminate tumors and make them disappear quietly. Biological therapy not only kills tumor cells, but also restores the stability of the internal environment of the body. At present, cytokines with mature application can effectively activate the body’s independent anti-tumor program, change the body’s internal environment, so that cancer cells “roaming around” can’t find their “base”, and label cancer cells with “tags”. It also labels cancer cells with “labels”, so that the human body can quickly identify and kill tumor cells, and specifically and directly kill tumor cells to make them shrink and subside. As a kind of endogenous treatment method, using cytokines to prevent and cure tumors can achieve the effect of prevention before and cure after, and become a new hope and direction to overcome tumors.