In this paper, we used web Service Bridge to solve the ASP.NET AJAX client cannot directly invoke the remote web service problem caused by the security restrictions of JavaScript. Web Service Bridge makes the AJAX client invoke the remote web services as if it invokes the local web services by defining the local service proxy for remote web service in XML declaration. The example demonstrates that, compared to the traditional method of programming local service proxy, web Service Bridge is more convenient and efficient to implement a large number of remote web service invocations in Mushup application.