Water conservancy projects are usually complicated and comprehensive.In that the hydraulic buildings are always complex in structure and different in shape, using virtual construction based on digital model and optimizing design in advance for the final hydraulic building is the most popular method in the design process of hydraulic structure. During the construction process of the Kaleta Hydropower Station Project, the parametric model is used to optimize the building design rapidly.Through a secondary development on those component templates, parameters and frequently-used API, we can integrate the parameters into editable documents, thus realizing the bidirectional drive between model and documentation.Furthermore, we can retrieve the template in line with the design requirements from library as needed.The program can automatically associate different parameters to the model, and generate the required model in one step.An example library collecting all well-designed models can provide reference for similar project.Based on models with different depth of detail, the collaborative platform can also realize the version control of models and deepening design as needed on construction site.Also, models and data can be extracted in assisting technical, site, schedule and cost management, which produces the final completion model.Last but not least, the completion model can be integrated with operation and maintenance information to facilitate the operation maintenance management.