The single most effective method for early diagnosis of esophageal cancer is early gastroscopy. Through gastroscopy and ultrasound endoscopy, the lesion site, lesion scope and length of esophagus can be visualized, and then the disease examination can be taken to diagnose esophageal cancer. For high-risk patients, long-term chronic reflux esophagitis or those with bad eating habits, such as those who often eat quickly, like to eat coarse and hard food, like to drink hot tea and so on, or those with family history, if abnormal symptoms or dietary changes occur, such as obvious poor eating or pain behind the whole sternum after eating, it is recommended to perform annual esophagoscopy in the hope of early detection and early diagnosis of tumor treatment. The purpose is to achieve early detection and diagnosis of tumor treatment.