1. A method for converging a desktop application and a Web application, the Web application being included in a Web server, the method comprising: starting a desktop application initialization process on the Web server and determining an appropriate corresponding hosting server for the user in response to a request from a client user for using a target desktop application; preparing and provisioning a desktop application environment on the corresponding hosting server and starting the target desktop application; transmitting the corresponding hosting server's address and a browser plug-in configured to intercept user input to the client to enable desktop application interaction between the client and the corresponding hosting server; and stopping and exiting the target desktop application on the corresponding hosting server in response to the completion of the desktop application interaction, with a user interface of the corresponding hosting server being displayed in a web browser at the client side.