In the field of hydropower project, the overabundance of information from multiplex data sources has forced managers and decision makers to spend much time dealing with information they need. Therefore the research on project simulation system is quite necessary. If system can provide some construction plan and schedule of the project properly, it will greatly improve the effectiveness of the plan. After the analysis of specific projects’ process and demands, this paper puts forward a visual simulation solution to large-scale hydropower construction, which including visual simulation model, design of algorithms and system implementation. Based on SOA structure, the optimization model and the simulation results’ 3D visualization are provided and a virtual three-dimensional world of the complicated coordinal construction process is proposed, with the advantage of direct viewing and real-time interactive, facilitating effective technical support for the decision of project construction design, and greatly enhancing the information level of design and organization of large-scale hydropower projects.