A handoff method, a switching device, and a terminal are provided. A first service link is established between a first terminal and a second terminal through a switching device. The method includes the following steps. A first switching device receives a call request from the first terminal, and the first switching device sends a link establishment request to the switching device on the first service link according to the call request. A switching device and a terminal are also provided. By adopting the handoff method, the switching device, and the terminal, only the switching device on the first service link is updated to support the universal handoff logic, and there is no requirement of whether the first switching device supports the universal handoff logic. In the case that it is difficult to update all the switches one by one to support the universal handoff logic in the current network, the handoff method is simple to operate and has wide universality.