Modern intelligent community is an important part of smart grid construction. Based on the comprehensive consideration of the advanced metering of electricity, water and gas, the distributed energy management of smart grid, the electric vehicle charging and the relevant energy efficiency technologies, and considering the status of smart grid technology, the business model of smart grid is discussed from three aspects, namely the type of investment allocation, the profit model and the profit analysis with detailed advantages and disadvantages analysis. Moreover, the technology roadmap of the business model research is divided into three classes: power companies-dominated, property companies-dominated and third-party companies-dominated. Then detailed analysis and comparison of the three classes are done in order to provide a comprehensive research report and decision support for customers and policymakers.