The big data analysis system of China's tourism based on network comment is the display portal and interactive window of this platform. Using component development mode, a big data analysis and monitoring system of national tourism is established based on network comment. This system realizes the functions of comprehensive high-quality index analysis, passenger flow source analysis, network influence index, thematic map analysis for scenic spot data, scenic spot detail query, network affective analysis for scenic spots, intelligent route planning, spatial and temporal analysis of GIS based on space-time data, etc. It explores the scenic spot management mode that can be popularized and the targeted propaganda mode. It provides effective decision support for the construction of smart tourism.