The integration of renewable energy generation, new energy vehicles, energy storage systems, and cogeneration systems plays a pivotal role in facilitating the low-carbon transition of regional integrated energy systems. The flexibility of power dispatch enables real-time electricity pricing in smart grids to serve as a critical tool for demand-side management, enhancing energy utilization efficiency and achieving peak shaving and valley filling in power supply-demand balance. To improve the multi-energy coordination efficiency of cogeneration systems and optimize social welfare, a real-time electricity pricing mechanism was designed for combined cooling, heating and power coupling systems. By integrating combined cooling, heating, and power systems, electric vehicle charging demands, energy storage devices, and renewable energy supply, a dual method was employed to solve the optimization model aimed at social welfare maximization. Simulation results demonstrate that the proposed pricing strategy effectively balances multi-energy supply-demand relationships under integrated energy coupling scenarios and significantly enhances overall social welfare.