Introduction  Improving energy efficiency is an important path to achieve low-carbon energy transition. The development of multi-energy complementary (MEC) projects has great significance to China's energy transition. How to ensure the sustainable development of MEC projects through business model innovation has become a research hotspot.

  Method  Based on the different application scenarios of urban functional areas, the corresponding relationships among load types, general energy demand and typical energy allocation were constructed, and the research on project investment mode, operation mode and profit mode was carried out based on the existing power market, demand side response market and carbon emission right market .

  Result  Three business models of assets, service and operation of MEC projects adapted to different urban functional areas are proposed, which enhance the feasibility and extensiveness of the business model.

  Conclusion  The research provides a reference for the planning and configuration of MEC projects in different scenarios and comprehensively expands the market types and profit sources that MEC projects can participate in, providing an important reference for the sustainable development of the project.