Aiming at the issues related to the single-set management of electronic archives for hydropower projects in terms of institutional construction, system construction, resource construction and security management, this paper develops a single-set collection and management system for infrastructure project documents. This system realizes the automatic collection of quality assessment forms, test inspection reports and their original records, as well as engineering receiving and dispatching documents into this system by seamlessly integrating three business systems of quality assessment, test inspection, and engineering receiving and dispatching. Within this system, after being sorted and inspected, the relevant data can be directly transferred to the digital archives by means of the one-click archiving function, thus meeting the requirements put forward in the Archives Law that electronic archives should have reliable sources, standardized procedures and compliant elements.