A multimedia broadcast multicast service, MBMS, communication method, comprising: obtaining, by a source base station, first group identity information of an MBMS service of a terminal device in a neighboring cell; and sending, by the source base station, the first group identity information to the terminal device, wherein if the neighboring cell belongs to a target base station, the obtaining, by a source base station, first group identity information of an MBMS service of a terminal device in a neighboring cell comprises: requesting, by the source base station, group identity information of the MBMS service in the neighboring cell from the target base station; and obtaining, by the source base station, the first group identity information, indicated by the target base station, of the MBMS service in the neighboring cell, wherein the requesting, by the source base station, group identity information of the MBMS service in the neighboring cell from the target base station comprises: sending, by the source base station, request information to the target base station, wherein the request information comprises second group identity information and is used to indicate that the second group identity information is group identity information of the MBMS service in a source cell, and the source cell belongs to the source base station; and the obtaining, by the source base station, the first group identity information, indicated by the target base station, of the MBMS service in the neighboring cell comprises: receiving, by the source base station, first indication information sent by the target base station, wherein the first indication information is used to indicate that the first group identity information is the same as the second group identity information. obtaining, by a source base station, first group identity information of an MBMS service of a terminal device in a neighboring cell; and sending, by the source base station, the first group identity information to the terminal device, wherein if the neighboring cell belongs to a target base station, the obtaining, by a source base station, first group identity information of an MBMS service of a terminal device in a neighboring cell comprises: requesting, by the source base station, group identity information of the MBMS service in the neighboring cell from the target base station; and obtaining, by the source base station, the first group identity information, indicated by the target base station, of the MBMS service in the neighboring cell, wherein the requesting, by the source base station, group identity information of the MBMS service in the neighboring cell from the target base station comprises: sending, by the source base station, request information to the target base station, wherein the request information comprises second group identity information and is used to indicate that the second group identity information is group identity information of the MBMS service in a source cell, and the source cell belongs to the source base station; and the obtaining, by the source base station, the first group identity information, indicated by the target base station, of the MBMS service in the neighboring cell comprises: receiving, by the source base station, first indication information sent by the target base station, wherein the first indication information is used to indicate that the first group identity information is the same as the second group identity information. requesting, by the source base station, group identity information of the MBMS service in the neighboring cell from the target base station; and obtaining, by the source base station, the first group identity information, indicated by the target base station, of the MBMS service in the neighboring cell, wherein the requesting, by the source base station, group identity information of the MBMS service in the neighboring cell from the target base station comprises: sending, by the source base station, request information to the target base station, wherein the request information comprises second group identity information and is used to indicate that the second group identity information is group identity information of the MBMS service in a source cell, and the source cell belongs to the source base station; and the obtaining, by the source base station, the first group identity information, indicated by the target base station, of the MBMS service in the neighboring cell comprises: receiving, by the source base station, first indication information sent by the target base station, wherein the first indication information is used to indicate that the first group identity information is the same as the second group identity information. sending, by the source base station, request information to the target base station, wherein the request information comprises second group identity information and is used to indicate that the second group identity information is group identity information of the MBMS service in a source cell, and the source cell belongs to the source base station; and the obtaining, by the source base station, the first group identity information, indicated by the target base station, of the MBMS service in the neighboring cell comprises: receiving, by the source base station, first indication information sent by the target base station, wherein the first indication information is used to indicate that the first group identity information is the same as the second group identity information.