One of the key issues in unban public space design is how to establish an evaluation system for its usage. The modernization for urban public space management cannot be achieved without the decision support service by intelligent evaluation system. In the 21st century, more attention has been paid to human activities and needs in public space design, and with the development of mobile information technology, it become possible to have access to a large number of network data (social network, theme website, or search engines etc.), reflecting urban space quality and peoples behavior characteristics. Based on the idea of Big Data, which uses cloud computing, this paper attempts to establish an intelligent evaluation method for urban public space by means of mobile information devices such as GPS, intelligent phone, social network, IC card and RFID communication technology.