Disclosed herein is a method and a network structure for moving a call leg, and implementing a call leg move with the network structure. The method includes creating a call leg moving interface and its method interface reference parameters, which are used to move a call leg from an original call to a destination call. The interface reference parameters are an identifier of a call leg to be moved and a destination call identifier. The method further includes, if an application wants to move the call leg, determining the interface reference parameters according to the call leg and the destination call, and invoking the call leg moving interface to move the call leg from the original call to the destination call with the interface reference parameters. In this manner, the disclosed method provides a simple, convenient, easy to implement and spread interface to the application to move the call leg from one call to another.