The survival time of oral cancer depends on the time of oral cancer detection and treatment. If it is detected and treated early, some oral cancers have a relatively high survival rate of 5 years or even 10 years. If the cancer is detected and treated late, or if distant metastasis has occurred, the result may be worse, usually about one year. If we consider the 3-year survival rate and 5-year survival rate of oral cancer, we need to consider the timing of starting cancer treatment, and we must recommend early diagnosis and early treatment as much as possible, and apply the current comprehensive treatment, surgery followed by radiotherapy or some need chemotherapy, so as to extend the survival period as much as possible. If the cancer is found to be advanced, the conditions for surgery are not enough, and if metastasis has occurred, the survival time may be shorter.