The embodiments disclose a method for identifying a Relay MSC, and a method and a device for group calling, wherein, when a calling service subscriber initiates a group call in a Relay MSC, the Relay MSC constructs a call setup message by using a Relay MSC number as a calling number and sends the call setup message to an Anchor MSC. After the Anchor MSC receives the call setup message, it identifies the Relay MSC where the calling service subscriber is located according to the calling number in the message. During the process of continuing to setup the group call, if the Relay MSC fails to set up the group call, the Anchor MSC removes the call which is being set up. It may be avoided to set up an unreasonable group call and to waste system resources.
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