A service handover method, executed by a first base station, the first base station being a base station of a first communication system that is currently communicating with a multi-card user equipment, wherein the method comprises: receiving (101; 201) a handover request signaling sent by the multi-card user equipment, wherein the handover request signaling is configured to request a handover to a second communication system, the handover request signaling carries second service information, and the second service information is service information of a to-be-transmitted service of the multi-card user equipment in the second communication system; generating a handover response signaling in response to determining to allow the multi-card user equipment to perform a handover operation based on first service information and the second service information, wherein the handover response signaling carries handover configuration information, and the first service information is service information corresponding to a to-be-transmitted service of the multi-card user equipment in the first communication system; and sending (103; 206) the handover response signaling to the multi-card user equipment; characterized in that generating the handover response signaling, comprises: determining an expected interruption time for the multi-card user equipment to interrupt the to-be-transmitted service in the first communication system based on the first service information; determining an expected time length that the multi-card user equipment is in the second communication system based on the second service information; determining the expected interruption time and the expected time length as the handover configuration information; and generating the handover response signaling carrying the handover configuration information. receiving (101; 201) a handover request signaling sent by the multi-card user equipment, wherein the handover request signaling is configured to request a handover to a second communication system, the handover request signaling carries second service information, and the second service information is service information of a to-be-transmitted service of the multi-card user equipment in the second communication system; generating a handover response signaling in response to determining to allow the multi-card user equipment to perform a handover operation based on first service information and the second service information, wherein the handover response signaling carries handover configuration information, and the first service information is service information corresponding to a to-be-transmitted service of the multi-card user equipment in the first communication system; and sending (103; 206) the handover response signaling to the multi-card user equipment; characterized in that generating the handover response signaling, comprises: determining an expected interruption time for the multi-card user equipment to interrupt the to-be-transmitted service in the first communication system based on the first service information; determining an expected time length that the multi-card user equipment is in the second communication system based on the second service information; determining the expected interruption time and the expected time length as the handover configuration information; and generating the handover response signaling carrying the handover configuration information. determining an expected interruption time for the multi-card user equipment to interrupt the to-be-transmitted service in the first communication system based on the first service information; determining an expected time length that the multi-card user equipment is in the second communication system based on the second service information; determining the expected interruption time and the expected time length as the handover configuration information; and generating the handover response signaling carrying the handover configuration information.