The invention relates to a power generation project technical and economic information system, and belongs to the technical field of informatization. The system comprises construction project basic information, technical and economic information management, a project bidding information base and system management. The system is composed of a user layer, an application layer, a platform layer and adata layer, the user layer can meet applications of a management unit, a service unit and a use unit, the application layer achieves basic service management, and the platform layer meets basic function setting of system application. The data layer provides management for data storage and setting of the system; System mainly comprises data entry, Data processing, Data analysis, Data cloud storage, data display and information security management are carried out, investment data storage and application of all stages of the whole life cycle of a project are achieved through program setting, data capture and computational programming, benchmarking analysis of technical and economic information of all stages of a single project and multiple projects is achieved, and references are provided for project investment decision making, optimization design, project implementation and production operation.