The work aims to explore how to adapt to the rapid development of information technology in the context of integrated transportation and tourism and focus on applying smart methods to enhance the functionality, convenience and user experience of public facilities in Chongqing rail transit, creating an efficient, comfortable, and interconnected travel environment for passengers. A combined quantitative and qualitative research approach was employed. User group demands and preferences were collected through surveys. The Analytic Hierarchy Process (AHP) was used to analyze public facilities in Chongqing rail transit. An evaluation indicator system was established, and indicator weights were determined based on results analysis. The application of smart tools such as big data, the Internet of Things (IoT), and artificial intelligence (AI) in public facilities of Chongqing rail transit could help government agencies, rail transit operators, and designers to use scientific data to fully enhance service function and level and precisely meet passengers' functional, cultural, and emotional demands. The study proposes a set of smart design methods applicable to public facilities in Chongqing rail transit. These methods focus on the genuine demands of passengers, take into account technological trends, effectively enhance the modernization of public facilities in Chongqing rail transit, and promote the integration of transportation and tourism. The related study also provides important theoretical foundations and practical guidelines for similar projects in the future.