A share memory service system and method of web service oriented applications, which includes the steps of declaring an object requiring to be shared of a plurality of web services as a shared object, storing the shared object to a shared virtual memory, and providing the shared object of the shared virtual memory for the access of the web services and a plurality of clients. Accordingly, a shared virtual memory may be simulated in any web service oriented applications, and the method of managing the shared virtual memory providing a way for web services of application program to access the shared object directly instead of invoking each other through the external call. Hence the complexity of service oriented applications development may be reduced.