The new technology of robotic surgery system, as an emerging technology, has shown certain application prospects in breast surgery. However, the new technology of robotic surgery system in China in the treatment of gynecomastia is still in the exploratory stage and needs to be further improved. This prospective, single-center, single-arm clinical study was conducted to use the single-port robot and evaluate the effectiveness and safety of the subcutaneous gland resection in the treatment of gynecomastia.