The work aims to carry out visual analysis on literature from the perspective of tourism service design in view of the good momentum of rapid development of tourism service design, so as to obtain the knowledge structure, research hotspots and development trend in the current field and provide reference for future service design in tourism service design research and tourism industry. The relevant data at home and abroad from 1990 to 2020 were collected from CNKI and Web of Science. CiteSpace was used to make a visual analysis on the literature publication time, highly cited literature, research hotspots and research frontiers of service design in tourism, to compare the differences between domestic and foreign researches. From 1990 to 2020, the research of tourism service design at home and abroad is on the rise. The popularity and citation frequency of foreign research is higher than that of domestic research, especially in the interdisciplinary field, with the focus on the built environment and traffic-related strategies. However, the domestic research focuses on the product service system, and tends to the mode of technology implementation. Considering the present situation and trend of research, an in-depth discussion is made on smart technology tourism, sustainable development and global tourism, and the new development trend of tourism service design is put forward.