A method for switching Termination state in an MG includes: exchanging between an MGC and an MG a ServiceChange request for a Termination in the MG, with a parameter used for instructing the Termination to be in a Test state carried in the request; testing by the MG the Termination according to the parameter. A method for switching the state of a Termination in an MG includes: after a test to a Termination is finished, switching the service state of the Termination to an InService or OutOfService state through exchanging a ServiceChange request for the Termination between an MGC and an MG Systems for switching the state of a Termination in an MG are also disclosed. When an MG or MGC tests a Termination, they can notify each other of the service state of the Termination, thereby simplifying the operations of switching the service state of the Termination.