A vestibular system examination device includes a platform unit and an examination unit. The platform unit includes abase, a driving mechanism mounted to the base, and a seat mounted to the driving mechanism and adapted for a user to sit thereon. The seat is driven movably and rotatably with six degrees of freedom by the driving mechanism. The examining unit includes a detector adapted for detecting eye movement or electrooculography of the user, a measuring module electrically connected to the platform unit for measuring location and displacement thereof, and a processing module electrically connected to the detector and the measuring module for receiving and processing data acquired from the detector and the measuring module.