Abstract: To meet the development demand of digital power grid and improve the management level of low-voltage distribution network, this paper develops a low-voltage intelligent management system of distribution network. Firstly, this paper designs the overall architecture of the system to meet the needs of integrating multiple sources of data, easy expansion, and efficient development. Then, each functional module of the software system is introduced, including data processing, topology identification, low voltage prediction, reactive power optimization and other modules, each module is independent and coordinated with each other, which not only meets the current demand of intelligent management of LV distribution network, but also reserves interfaces to meet the future requirements. Moreover, the intelligent key technologies of each module are elaborated to provide effective solutions for the construction of intelligent systems. Finally, an application example is given to verify the feasibility and effectiveness of the software.