In addition to gastroscopy, carbon 13 or carbon 14 urea breath test, upper gastrointestinal imaging, and CT scan of the abdomen can detect gastric diseases. 1. Carbon 13 or Carbon 14 Urea Breath Test: This test can clarify the presence of Helicobacter pylori infection. 2. Upper gastrointestinal imaging: the peristalsis of the stomach can be observed through the contrast medium, and it can also determine whether there is atrophy of the gastric mucosa, ulcers and other lesions. 3. Abdominal CT: Abdominal CT examination can reveal polyps, ulcerative lesions and malignant tumors in the stomach. It should be clear that gastroscopy is a kind of examination that cannot be replaced by other examinations, and if necessary, gastroscopy is still the first choice for diagnosing many diseases.