Based on medical image data, VR technology can create a visualized three-dimensional environment of human organs in accordance with human operating habits, so that doctors can accurately determine spatial location, size, geometry, and spatial relationship with the surrounding tissue structure. This new approach will overcome the uncertainties in traditional medical visualization methods, and let doctors easily make preoperative planning and virtual surgery. This paper designed and implemented a VR visualization system for medical images, and allowing doctors to conduct disease analysis, surgical training or surgical education in a virtual environment. In particular, patients can also use virtual reality devices to communicate their illnesses with doctors, and to ease the contradiction between doctors and patients. The entire system has been basically implemented and trial run. We suggest it might has certain value for the specific application of virtual reality technology in precision medicine.