Picassos assist system is a minimally invasive surgical robot assisted by digestive tract. Cooperate with gastroscope and electric knife to accurately remove gastric cancer, stones and other tumors, enter the stomach through the digestive tract, and then remove the body to achieve the purpose of accuracy, speed and less bleeding. The traditional resection of gastric cancer tumor mass requires the cooperation of multiple attending doctors. The surgical robot can be operated by a doctor with nursing staff. The operation is accurate, safe, fast and has little risk of reinfection.