Gastroscopy is preferred: Gastroscopy plus biopsy is the most reliable method to diagnose gastric cancer and is an effective method for early diagnosis of gastric cancer. The combined application of cytological examination and pathological examination can greatly improve the positivity rate of diagnosis. 2.Secondary barium meal: painless and easily accepted by patients; “gas and barium” double contrast imaging can make qualitative and quantitative diagnosis of gastric cancer; it is one of the main means of gastric cancer diagnosis; the confirmation rate is 86.2%. However, it is difficult to detect early gastric cancer. 3.Abdominal ultrasound: it cannot be used as a method of early diagnosis, but it can determine the extra-gastric invasion and lymph node metastasis of gastric cancer. It can provide the basis for surgery. Surgery is the main treatment method for gastric cancer and the only possible means to cure progressive gastric cancer. Therefore, surgery for gastric cancer should be taken as a positive treatment: as long as the patient’s general condition permits and there is no clear distant metastasis, caesarean operation should be performed. 2.For middle and late stage gastric cancer, because of the high recurrence and metastasis, it must be actively supplemented with comprehensive treatment measures such as preoperative and postoperative chemotherapy radiotherapy and immunotherapy to improve the efficacy. 3.If radical resection is not possible due to late stage of disease or serious comorbidities of major organs, palliative surgery with resection of primary foci should be pursued according to specific conditions to facilitate comprehensive treatment. 4.For unresectable advanced gastric cancer, comprehensive treatment should be actively adopted to improve symptoms and prolong life. To sum up, people who suffer from “stomach disease” must go for gastroscopy. Nowadays, gastroscopy can also be done with anesthesia, also known as painless gastroscopy, which means that a small amount of intravenous anesthetic is used to make you unconscious during the whole procedure, which can avoid the discomfort caused by gastroscopy and dispel the fear of doing gastroscopy. However, because pain is the body’s protective response, the loss of this protection results in a corresponding increase in complications from gastroscopy. There are advantages and disadvantages. Do not blindly pursue painless gastroscopy. Third, warm tips: Don’t think that if you have stomach disease, you will definitely get stomach cancer. As long as you have regular gastroscopy, you can avoid the emergence of advanced gastric cancer and relieve the unnecessary psychological burden.