Volume rendering is well-developed technology for visualization. It had been used for medical data visualization in both research and clinic. The massive growths of the Internet and the World Wide Web lead us to a completely new way of looking at the development and distribution of visualization software. Using Java as programming language, we developed the 3D applet that rendered medical images on Internet. The client upload their 2D images, visit WWW server to get the 3D results of renderings. It changes traditional computing mode and realizes the share of information. It provides the tool for telemedicine visualization. Different organ images are shown in this paper. The results are clear enough to be involved for clinical diagnosis and proved this methad to be practical.