The disclosure discloses a method for realizing single radio voice call continuity, which is applied in an IP Multimedia Core Network Subsystem (IMS) network. The method includes: receiving, by a service continuity application server (SC AS), a handover request, and then updating, by the SC AS, a remote leg, and transmitting, by the SC AS, a handover notification message to a user terminal; receiving, by the user terminal, a handover command in a Packet Switch (PS) domain and the handover notification message, then adjusting, by the user terminal, an access mode to be accessing a Circuit Switch (CS) domain. The invention further discloses a system for realizing single radio voice call continuity. The method and system for realizing enhancement of single radio voice call continuity provided by the disclosure can effectively reduce the overlong interruption time in the prior art, and greatly improve the user experience.