Immunotherapy is divided into immunosuppression and immuno-strengthening. Indications for immunosuppression mainly include tumors, hematological disorders, and rheumatological-immune disorders. The indications for immune enhancement are those with low immunity. Immunotherapy refers to the use of immunological principles and immunological means to enhance or inhibit the body’s immune function artificially for the purpose of treating diseases by targeting the body’s low or hyperactive immune state. Immunosuppression is applicable to the treatment of tumors, blood system diseases and rheumatic immune system diseases. Tumors such as prostate cancer, kidney cancer, bladder cancer, ovarian cancer, breast cancer, cervical cancer, lung cancer, laryngeal cancer, colon cancer, rectal cancer, pancreatic cancer and so on. Hematologic system diseases such as multiple myeloma, B-lymphoma and leukemia. Rheumatic immune system diseases such as rheumatoid arthritis, systemic lupus erythematosus, scleroderma, dermatomyositis, etc. Immune enhancement is applicable to immunocompromised people, such as those with congenital immunodeficiency and those with severe infections. Immunotherapy can also be applied to patients after surgery for tumors and other diseases to prevent tumor metastasis and recurrence. It can also be used for patients who have failed radiotherapy or chemotherapy or are unable to undergo radiotherapy or chemotherapy. It is recommended that patients go to regular hospitals and consult professional doctors according to their own situation, whether it is suitable for immunotherapy or not. If treatment is needed, it is recommended to follow the doctor’s instruction and use the medication as prescribed by the doctor.