A rate adjustment method, comprising: determining, by a mobility management network element, access information indicating whether a terminal uses 3GPP New Radio, NR, for access; and determining, by the mobility management network element, first access point name-aggregate maximum bit rate APN-AMBR information based on the access information; characterized in that before the determining, by a mobility management network element, access information indicating whether a terminal uses NR for access, the method further comprises: receiving, by the mobility management network element, a second message from a master network node, wherein the second message comprises second indication information and a location of the terminal, and the second indication information is used to indicate a dual-connectivity capability of the master network node; receiving, by the mobility management network element, third indication information from the terminal, wherein the third indication information is used to indicate a dual-connectivity capability of the terminal; and the determining, by a mobility management network element, access information indicating whether a terminal uses NR for access comprises: determining, by the mobility management network element based on the second indication information, the location of the terminal, the third indication information, and first configuration information, the access information indicating whether the terminal uses NR for access, wherein the first configuration information comprises a tracking area identifier and a dual-connectivity capability of a tracking area corresponding to the tracking area identifier. determining, by a mobility management network element, access information indicating whether a terminal uses 3GPP New Radio, NR, for access; and determining, by the mobility management network element, first access point name-aggregate maximum bit rate APN-AMBR information based on the access information; characterized in that before the determining, by a mobility management network element, access information indicating whether a terminal uses NR for access, the method further comprises: receiving, by the mobility management network element, a second message from a master network node, wherein the second message comprises second indication information and a location of the terminal, and the second indication information is used to indicate a dual-connectivity capability of the master network node; receiving, by the mobility management network element, third indication information from the terminal, wherein the third indication information is used to indicate a dual-connectivity capability of the terminal; and the determining, by a mobility management network element, access information indicating whether a terminal uses NR for access comprises: determining, by the mobility management network element based on the second indication information, the location of the terminal, the third indication information, and first configuration information, the access information indicating whether the terminal uses NR for access, wherein the first configuration information comprises a tracking area identifier and a dual-connectivity capability of a tracking area corresponding to the tracking area identifier. receiving, by the mobility management network element, a second message from a master network node, wherein the second message comprises second indication information and a location of the terminal, and the second indication information is used to indicate a dual-connectivity capability of the master network node; receiving, by the mobility management network element, third indication information from the terminal, wherein the third indication information is used to indicate a dual-connectivity capability of the terminal; and the determining, by a mobility management network element, access information indicating whether a terminal uses NR for access comprises: determining, by the mobility management network element based on the second indication information, the location of the terminal, the third indication information, and first configuration information, the access information indicating whether the terminal uses NR for access, wherein the first configuration information comprises a tracking area identifier and a dual-connectivity capability of a tracking area corresponding to the tracking area identifier. determining, by the mobility management network element based on the second indication information, the location of the terminal, the third indication information, and first configuration information, the access information indicating whether the terminal uses NR for access, wherein the first configuration information comprises a tracking area identifier and a dual-connectivity capability of a tracking area corresponding to the tracking area identifier.