Ecosystem services assessment has become more frequently and widely used in land-use management, city management and the valuation of ecosystem benefits. Working with traditional tools from different domains, the variety of ecosystem services and their large data demands place significant requirements on ecosystem assessment efficiency. This has prompted the need for professional ecosystem assessment tools. Most of the current ecosystem assessment software are developed by foreign groups. Parts of these models and their parameters have not been successfully indigenized to Chinese data structure and ecosystem management demands. This paper introduces a Chinese tool for ecosystem assessment, Intelligent Urban Ecosystem Management System (IUEMS), and its application. Addtionally, a comparison of five aspects (operation method, ecosystem services models, data requirement, spatial accuracy and user interface) is made using IUEMS and four other popular ecosystem assessment tools from around the world.