The invention discloses a VR (virtual reality) testing device used for predicating early symptoms of AD (Alzheimer's disease). The device comprises a VR scene setup module, a task scene module, a target object placement module, an azimuth angle error measurement module, a target orientation error norm module and an evaluation module. The position and orientation of each object in a VR scene are controlled by setting up a VR scene program; a task scene is established in the setup VR scene; a subject forms a memory according to directions of target objects in the task scene, and the target objects are placed in corresponding positions; the angle error of an orientation angle is measured according to azimuth between the real-time position orientation of the subject and the actual position ofthe target in the target searching process in a task; and the early symptoms of the AD is predicated according to the target orientation error established after large-scale actual measurement. The purpose can be achieved only by analyzing behavior data of the subject, the implementation cost is low, and the early diagnosis efficiency of AD is greatly improved.
VR (virtual reality) testing device used for predicating early symptoms of AD (Alzheimer's disease)