Abstract: Device modeling, as an important part of monitoring system in swapping station. In traditional supervisory control and data acquisition(SCADA) systems, device instance is typically created first, and then the corresponding measurement point is configured, which is suitable for stable device in station. Aiming at the poor adaptability of existing SCADA system in modeling for transfer device, we propose a modeling method based on virtual mapping. It firstly configures the necessary virtual devices based on scale of station. And then, it configures the measurement points of virtual devices. Finally, it configures the real transfer devices according to actual scenarios. This paper takes the virtual mapping as the modeling basis to achieve the modeling of transfer device, and the proposed method is simple and reasonable with better engineering applicability.