Large gravitational wave detection telescopes mostly are installed in extreme environments such as plateaus and Antarctica, which are quite heavy and require high-speed and high-precision scanning. Put in such conditions of low temperature and heavy load, traditional bearings are faced with problems like creeping and lubrication failure, which make it difficult to achieve the movements required. In addition, due to the remote sites and the tight energy supply, the telescope system needs to consider energy saving. To solve these problems, this paper puts forward an electromagnetic suspension (EMS) unloading scheme. Firstly, the effectiveness of the scheme is verified from the perspective of power. Secondly, the mathematical model of the electromagnetic force is derived and verified by Maxwell 2D simulation software. When the air gap is 0.9mm and the current reaches 0.5Α , the maximum deviation between the calculated value and the simulated value of the electromagnetic force is only 0.6%, indicating the correctness of the theoretical calculation. This paper can provide a reference for similar engineering designs.