A particle beam therapy system transports an ion beam emitted from an accelerator to one of a plurality of treatment rooms. The interbody fusion device comprises a superior endplate and an inferior endplate that are movable in an expansion direction relative to each other in the intradiscal space. The present application solves the problem of a user being unable to acquire the type of network connected to a BS and accordingly being unable to determine the corresponding connection means, and enriches user experience.