Abstract: Multi energy complementary system provides safe and reliable energy supply through the optimal coupling of cold, hot and electrical energy, which is the way to achieve the optimal social energy efficiency, promote the utilization of renewable energy and realize sustainable development. The income structure, profit model, optimization objectives and influencing factors of the multi energy complementary system are analyzed. The actual case of an economic development zone in a certain region shows that: different project investors, result in different optimization objectives and operation modes as well as profitability of multi-energy complementary system operators. The profit of source + network + dispatching control center mode is higher than that of network + dispatching control center mode. If the load can participates in the demand-side response, the cost of energy supply can be further reduced. The research results can provide reference for commercial operation of multi energy complementary system in China.