Gastric ultrasound and gastroscopy are two different means of examination, the difference is manifested in the principle of the examination mode, the purpose of the examination and so on. 1. Examination method: the former is non-invasive, the latter is invasive. Gastric ultrasound is to view the general condition of the stomach with an ultrasound probe in the abdomen, while gastroscopy can enter the gastrointestinal tract through the mouth and nose for examination. 2. Purpose of examination: the accuracy of gastric ultrasound may be poor, and the gastric ultrasound can not clearly find the tiny lesions of the gastric mucosa. And gastric ultrasound can not biopsy pathology examination. Gastroscopy is different, under the gastroscope, you can clearly see whether there are lesions on the surface of the stomach, the location of the lesions, and you can also take a piece of tissue for biopsy at the location of the lesion. In addition, gastric ultrasound can only be used for examination, but gastroscopy can be used for treatment, such as hemostasis under gastroscopy. Consult your physician for advice on which test to use.