Remote computing means that the users on local machine make use of computing resources on remote super computers through the Internet. The traditional remote computing method is logging onto the remote machines by using telnet protocol to accomplish all kinds of work. This method is efficient in a high-speed and stable networking environment. But when the network is in a low-bandwidth and unstable condition, this method will seriously influent the users's work efficiency. A computing method called remote virtual computing is presented which is suitable for low-bandwidth and unstable networks.It uses the technologies such as check-point setting/recovering,compressing directory tree transferring to furthest reduce the network flux.The practice proves that this is an efficient remote computing method under the present network condition in china.