The customer’s demands towards diversity and quick response in the supply chain environment have placed higher demands on port service supply chains (PSSCs) and information systems have been important means to realize the goal. With flexibility and quick response, an information integration pattern and the related coordination mechanism is designed for PSSCs to enhance their competitiveness. The connotation and basic structure of PSSCs are given. Through comparison of the pros and cons of the four integration patterns as straight-chain, cross-level, net-shaped and integrated management patterns, the fourth is selected as suitable. A three-layered information management structure is designed to be made up of the strategic, the controlling and the operational layer. The work logic is provided and the coordination mechanism is pointed out.