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This research designs a concept of integrated cost control, contract management and information collaboration in the Project Management Information System (PMIS), based on the EXPO 2010 Shanghai construction project. In our model, the “Basic Unit of Public Information (BUPI)” and “Contract Control Unit (CCU)” are originally discussed to create the relationship between the cost control and the contract management, and to meet various demands from project managers and owners in mega projects. A static framework in the context of web-based project information platform is introduced later to examine this concept, where different information of project level, contract level, and CCU level can be shared and integrated effectively. This research initially bridges the gaps between the cost control and contract management especially for mega project in the construction industry, and the result can be applied in both academic and practical fields.