In order to assist the construction of micro grid, this paper designs and implements the virtual reality (VR) system of micro grid with the help of VR technologies. The VR system consists of the main components, such as photovoltaic panels, inverters and energy storing devices. Firstly, these components are modeled by using 3DSMax to generate the scene of a photovoltaic micro grid. Secondly, these models are loaded into Quest3D to obtain the VR system of the micro grid. Finally, the micro grid can be roamed in the VR system. The VR system is helpful for the design and construction of micro grid.