The purpose of the H. pylori test and gastroscopy are not the same, so there is no such thing as which test is accurate. For H. pylori testing, it is simply to know whether there is H. pylori infection inside the stomach. Gastroscopy is an electronic gastroscopy to visualize the specific lesions of the esophageal mucosa, gastric mucosa, and duodenal mucosa. If the upper gastrointestinal tract is found to be diseased under gastroscopy, mucosal biopsies can be taken for pathological biopsy or microscopic treatment. However, gastroscopic biopsies can also be taken for rapid urease assay, which means that gastroscopy can be performed to detect H. pylori at the same time. However, the rapid urease assay is an invasive test, so patients can choose carefully. For testing with H. pylori one can also use a breath test, such as a carbon 13 or carbon 14 breath test. Both the breath test and the rapid urease assay are more accurate in detecting H. pylori and other bacteria.