In the decade since the turn of the millennium, the incidence of breast cancer in Shanghai has increased from 37 cases per 100,000 people to 80 cases per 100,000 people, and both adolescent and perimenopausal women have become alarmed. With the increase of self-examination rate, the detection rate of breast cancer has also increased year by year, the percentage of early stage breast cancer has also increased, and the number of patients receiving breast-conserving surgery has also increased from 15% at the beginning of the century to 27%. The most striking change in breast cancer radiotherapy in 2013 is the significantly better acceptance of “short-course” radiotherapy than in the past. Multiple institutions have studied the survival and recurrence rates of short-course, localized breast radiotherapy, and have seen no significant disadvantages, but rather advantages in terms of time savings, reduced pulmonary side effects, and better patient acceptance. Previous discussions such as whether endocrine therapy should be started in parallel with radiotherapy reached a consensus that early initiation of endocrine therapy would not hinder the initiation of radiotherapy. Patients with axillary lymph node metastases, whether breast-conserving or radical, should receive postoperative radiotherapy to the supraclavicular region to provide a greater survival benefit after limited injury. Therefore, an early visit to the radiotherapy department to find out if you need radiotherapy is one of the priorities of treatment for breast cancer patients. Hopefully, in the next decade, updates in radiotherapy technology will bring more advantages and convenience to radiotherapy for breast cancer!