Abstract: Disclosed is an artificial intelligence (AI)-based gastroscopic image analysis method including a step of configuring training data and training the plurality of image classification models, a step of observing or photographing respective parts of a stomach from the oral cavity and the laryngopharynx to the second part of the duodenum using a gastroscopic probe, a step of automatically classifying and recognizing the anatomical location of the stomach with respect to an image captured during photographing using the plurality of image classification models, automatically storing or reporting the location of a lesion, and a step of segmenting an image of a specific part in the captured gastroscopic image for each region by a region segmentation model and outputting the same number of segmented maps as the number of target classes as the result of segmentation.