Distribution room is a bridge in the power transmission system, where voltage or current of electric energy is transformed, centralized, and distributed. With the gradual expansion of the power grid, the number of distribution rooms has increased rapidly. However, traditional distribution rooms have low work efficiency and cannot meet the rapidly developing power supply scale and the high electricity demand of residents. In order to effectively maintain the stable and efficient operation of the power system, it is urgent to make changes to the operation and management of traditional distribution rooms. To address this issue, this article proposes a 4-level unmanned distribution room system architecture based on digital twin technology. It relies on digital twin technology to digitally model and physically map all elements of the distribution room, including the physical entity of the distribution room, the information-physical fusion of the distribution room, the digital twin modeling of the distribution room, and the intelligent operation and maintenance platform of the distribution room. By relying on real-time data transmission, it can achieve mutual mapping between physical space, physical objects, virtual space, and virtual objects. In this article, modeling tools such as Blender were used to model the three-dimensional spatial structure of the distribution room, construct a distribution room model in 3D space, and realize data interaction and real-time monitoring of the digital twin distribution room through an intelligent operation and maintenance platform. The feasibility of constructing a digital twin distribution room model was verified.