There is no fixed time for how long can one live with stage II breast cancer. If regular checkups can detect breast cancer at an early stage, and if breast cancer is treated at an early stage, then the survival time will be greatly improved, and if it reaches an advanced stage, the chance of survival will be drastically reduced. Stage II breast cancer treatment starts with surgical excision, after which appropriate adjuvant treatments, such as radiotherapy, are carried out according to immunochemical results and pathological results. Stage II breast cancer, which is still relatively early, if it is possible to perform modified radical surgery for breast cancer and chemotherapy or endocrine therapy after the surgery, the effect is still very good, and 90% of the patients may be able to live for five years, or even more than five years. With the increase of time, the probability of tumor recurrence and metastasis will be lower, so basically they can live longer.