The data related to mine resource reserves is extensive and subject to frequent changes. Traditional resource reserve management system typically handles singular data types, which leads to low operational efficiency among personnel and increases the risk of data loss. In response to national policies advocating for the use of three-dimensional digital methods in resource reserve management, and to address the challenges in controlling resource reserve data caused by weak informatization equipment and infrastructure, the Shitoumei No. 1 open-pit coal mine in the Santanghu mining area of Hami, Xinjiang, has actively promoted intelligent construction. The mine has implemented a three-dimensional dynamic management system for mineral resource reserves, designed using a combination of B/S and C/S architectures. This system is based on digital three-dimensional models that calculate and display dynamic changes in data during production processes in real time. The resource reserve management system operates on a logical architecture of data storage, platform services, and application services, enabling refined management across mining ledgers, data management and reporting, mining rights, exploration activities, and coal quality. Since its deployment, the system has been performing well, reducing the discrepancy rate in coal output design by 16%, achieving a 100% rate of centralized data control, and significantly enhancing the accuracy of resource reserve evaluations. The system has improved the overall efficiency of resource reserve management and advanced the informatization of open-pit coal mine reserve management within the company.