A system and method for implementing interactive operations between a mobile communication terminal and an Email box. The system includes a database (DB) server, a format transforming Email-box server and an intermediate processing server. The method includes the following: performing, by the mobile communication terminal, interactive operations with an Email-box server where the Email box located via an intermediate server; first determining, by the intermediate server, communication mode set by a corresponding user according to set user information, during process of performing an interactive operation procedure; and providing, by the intermediate server, an interactive-operations processing service for the user's mobile communication terminal and the user's Email box with determined communication mode.