A method for realizing a single radio voice call continuity and a single radio voice call continuity system are disclosed. After a UE-1 establishes an IMS session with a remote leg through a PS network, wherein in the IMS session, signaling is anchored to an ICP and media is anchored to an AGW controlled by the ICP, the method is realized as follows: sending a handover request by a control net element of the PS network to an eMSC to request a handover of the IMS session to a CS network access mode; after receiving the handover request, preparing a media link resource by the eMSC for the UE-1 to communicate with the eMSC and sending a call request to the ICP; and controlling the AGW to correlate a media link established by the call request with a remote leg media link of the IMS session by the ICP. The method can effectively solve the problem existing in the prior art that the duration of interruption is too long, and improve user experience.