The allforone tourism meteorological service system model based on multisource data integration technology is designed based on the needs of allforone tourism weather services. According to the model, the local weather, geography, tourism, ecology, economy, society and other multisource data from Hainan Province are combined to develop a “sitebased weather navigation map of scenic roads” on WeChat. Through actual operational application for a period of time, the system can provide more accurate comprehensive tourism information for clothing, food, housing, travel, and entertainment, as a reference for tourists, to avoid harm and enhance the capabilities of overall tourism weather service in Hainan. At the same time, some problems that need further improvement and optimization are also discussed.