With the development of gastrointestinal endoscopy technology in recent years, the diagnosis rate of early gastrointestinal cancer has gradually increased. In addition to traditional surgery, minimally invasive endoscopic treatment can be chosen for early GI cancer, and minimally invasive endoscopic treatment has many incomparable advantages over surgery, such as less trauma, faster patient recovery, shorter hospitalization time and lower hospitalization cost. At present, our department has developed various endoscopic treatment methods for early gastrointestinal cancer, which are shared as follows: Endoscopic minimally invasive treatment for early esophageal cancer (ESD) Endoscopic minimally invasive treatment for early gastric cancer (ESD) Endoscopic treatment for early colorectal cancer (ESD)