Cancer has the possibility of cure, especially early stage cancer, such as early breast cancer, colorectal cancer, lung cancer and other tumors can be cured by radical surgical resection, and after radical surgical resection still early stage can be exempted from post-operative adjuvant radiotherapy, chemotherapy or targeted therapy and other means. Certain tumors of the hematological system such as lymphoma and leukemia, especially acute lymphoblastic leukemia in children, can be cured, so it is entirely possible to cure cancer, but the prerequisite is early cancer. The main method to detect early cancer is regular medical checkups, especially targeted medical checkups, such as ultrasound, CT plus AFB examination for early detection of liver cancer if there is a history of hepatitis, and a family history of breast cancer, once a breast lump is found, puncture pathology should be done in time to detect early breast cancer.