With the awareness of breast cancer, people have realized that breast cancer is a systemic disease, and the treatment of breast cancer is increasingly adopted as a comprehensive treatment. In contrast to breast cancer surgery, large-scale randomized controlled clinical trials have shown that breast-conserving surgery + radiotherapy for early-stage breast cancer has the same effect as traditional radical surgery. Because breast-conserving surgery is less destructive, preserves a woman’s breast, has cosmetic effects, and improves the quality of life, breast-conserving surgery accounts for 50% of all breast cancer surgeries in Europe and the United States. So which patients are suitable for breast-conserving surgery?