Abstract: With the increasing adoption of the EPC mode in hydropower engineering, a general contractor is necessary to make an overall arrangement and comprehensive control of the progress, quality and cost, to coordinate the relationship between parties, thereby ensuring orderly convergence and reasonable crossing of every step and improving the level of project management. This paper presents a new methodology for collaborative management of EPC projects using the technology of building information modeling (BIM). We construct a collaborative work model based on analysis of collaboration elements in hydropower EPC (hydroEPC) projects. Then, we describe its overall architecture and functional design on a BIM-based collaboration platform along with an elaboration of the platform requirements, and explain in detail the procedure of association and coordination of BIM and EPC on the platform. Finally, a prototype system is developed using the network programming language to enhance information sharing for collaborative management in a hydroEPC project. Application in a case study demonstrates that this system is effective and simple for collaborative management in hydroEPC projects.