Endoscopic and robotic surgeries feature small incision and reducing surgical trauma, and minimized incision scars. However, the oncological safety of their application in breast-conserving surgery and breast reconstruction for breast cancer has always been a focal clinical concern. The breast-conserving surgery and breast reconstruction using the suspension, insufflation, and lipolysis methods could achieve precise tumor resection in the selected patients and under the specific surgical conditions, with the support of appropriate instruments. Meanwhile, the innovative application of the reverse-sequence method and auxiliary port technique has further enhanced surgical efficiency and the precision of tumor resection. Current studies suggest that endoscopic and robotic-assited breast-conserving surgery and breast reconstruction yield in terms of oncological outcomes comparable to those of conventional open breast-conserving surgery, including positive margins, local recurrence, regional recurrence, distant metastasis, and overall survival. These approaches offered advantages in minimally invasive techniques and aesthetic outcomes. However, existing research was limited by short follow-up period and small sample sizes. Future large-scale, long-term prospective randomized controlled trials are needed to further validate their oncological safety and long-term efficacy. These studies could help establish novel techniques as standard surgical approaches for breast cancer, particularly the efficient and streamlined reverse-sequence endoscopic and auxiliary port-assisted techniques.