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Travel has become a way of life for more and more people. The rapid development of technologies such as the Internet and 5G brings convenience to life, so recording one's travel through social media has become the main way of sharing. Based on the classification of UGC pictures by computer program, this paper studies the perception of tourist destination image by inbound tourists from different regions so as to find the factors that potentially affect tourists' decision-making. This study collects a large number of UGC pictures and classifies them according to computer programs. It conducts UGC data picture research through two different aspects of cognitive image and emotional image and finally analyzes the specific image perception of Shanghai tourism. The research results show that, in the analysis of specific inbound tourists' perception of tourist destination image, in the eyes of Western inbound tourists, Shanghai is a very modern cultural city with very distinctive architectural features; inbound tourists from East Asia are more and more interested in the cultural landscape and natural scenery of Shanghai. In the eyes of inbound tourists from East Asia, Shanghai is a city full of vitality. Among them, the Huangpu River is the place that receives the most tourists. 21.5% of inbound tourists will visit, and 13.7% of inbound tourists choose to visit Lujiazui. [ABSTRACT FROM AUTHOR]