The integrated platform of 3D co-design in water resource and hydropower project developed by our company is applied in Pakistan Karot hydropower project, which integrates multiple professionals of surveying, geology, hydraulic engineering, mechanical and electric engineering, and construction site layouts. The platform integrates the traditional mode of investigation and design, and establishes a multi-professional 3D survey and design model. During the research stage in engineering survey and design, the plateform is also able to develop multi-dimensional professional work including digital data collecting of geology on site, indoor geological database management, comparison and justification of schemes, accurate modeling and analysis of hydraulic parameters, automatic statistic of quantities, 3D reinforcing, 2D drawing and emulation of work process, thus to provide better quality design products and consulting services for owners.