A method for responding to termination service state change indication is provided. The method includes: receiving a command message indicating a termination service state change, in which the command message at least includes a method parameter and a duration parameter, the method parameter indicates a change method of the service state, and the duration parameter indicates a maintaining duration of the service state after being changed; and changing the service state of the termination according to method parameter content information of the received command message, and maintaining the changed service state according to duration parameter content information of the received command message. Accordingly, a media gateway controller (MGC) and a media gateway (MG) of the termination service state change indication based on the media gateway control protocols are also provided. The termination service state change and the maintaining duration of the service state after being changed are indicated simultaneously, which is rather convenient for the MG or MGC to realize effective subsequent control on the termination after the service state change of the termination.