The information technology has great influence on both the structure of the tourism industry and the strategy of the tourism enterprises in this age of big data. This paper focuses on the problem how information technology can be used to improve the performance of tourism enterprises. Considering the specialty of tourism industry, this paper develops a data-sharing model including internal and external data-sharing center to promote performance by reducing cost, improving service quality and extending market volume etc. Data-sharing is a complicated process including several steps, such as collection, evaluation, selection, classification and integration. These steps form a data mining cycle to provide more resourceful information for the tourism enterprises and its stakeholders, thus the business performance of the enterprises can be improved steadily and continuously. It can be expected that data-sharing model will be extensively applied to many tourism conglomerates in the near future