This paper addresses the challenges of multi-party collaboration，information security，and data sharing in the construction of hydraulic and hydroelectric engineering projects.It proposes a management platform solution based on WeChat Mini Program，WeChat Cloud Database，and Tencent Cloud Server.The system integrates a Mini Program and a web-based platform to achieve visual management and real-time data interaction for the modules such as user management，engineering data，progress tracking，quality control，contract management，budget estimation.A distributed architecture，fine-grained access control，and data synchronization mechanisms are implemented to ensure information consistency and security across regions and devices.Test results indicate that the platform performs stably under high concurrency and large-scale data scenarios，effectively improving construction efficiency and management capability.This solution provides a feasible pathway for the digital transformation of hydraulic and hydroelectric engineering projects.