Based on the data of Ctrip. com, this study analyzes the satisfaction of China tourists after booking hotels online when they travel to South Korea. Extract the online word-of-mouth data of Ctrip, analyze the comment data based on grounded theory, extract the keywords in the comments and sort them out to form the influencing factors of tourists’ hotel booking, split the comment sentences with python, analyze the keywords in the sentences, conduct emotional analysis with Python, score the emotional analysis of each influencing factor corresponding to each sentence, and finally get the satisfaction score of each factor. According to the score, it is proposed that Korean hotels should use more platforms for China tourists and China tourists to carry out targeted marketing activities, pay attention to language communication in service, and pay attention to the improvement of hotel facilities decoration with the change of tourists in China