Modern telemedicine is an emerging subject involving computer networking, multimedia and medical diagnosis. Since the current systems are platform-dependent and weak at remote controlling, combining JMF (Java Media Framework) framework and RMI (Remote Method Invocation) technique, this paper discusses the multimedia communication across different platforms, remote PTZ camera controlling and so forth to improve the weakness of platform-dependent and remote controlling. Tested in real world, the telemedicine system proposed in this paper is proved to be portable and good at remote controlling.