The Port Integrated Energy System (PIES) is qthe solution in helping obtain a cost-effective green energy source for ports to provide all the energy demands of a port. However, the coupling of multiple energy sources increases the complexity of the system operation, so effective optimization methods are needed to ensure its operation economy. By analyzing the structure of the port integrated energy system, a practical framework of the port integrated energy system is constructed. On this basis, a collaborative optimization scheduling method for port integrated energy system is proposed. The simulation results of the case show that the collaborative optimization operation can greatly improve the economic efficiency of the port integrated energy system.