A communication method based on a base station control device group, comprising: determining, by a first base station control device, that a cell under control of a second base station control device needs to be controlled by the first base station control device, wherein the first base station control device and the second base station control device belong to a same base station control device group; activating, by the first base station control device, configuration information of the cell backed up in the first base station control device; sending, by the first base station control device, an uplink signaling message to a core network node, wherein the uplink signaling message carries identity information of the cell; and after the core network node establishes a mapping relationship between the first base station control device and the cell according to the uplink signaling message, replacing, by the first base station control device, the second base station control device to control the cell, so as to provide communication services for a user equipment in the cell; wherein the determining, by the first base station control device, that the cell under the control of the second base station control device needs to be controlled by the first base station control device comprises: in a situation where the core network node works normally, sending, by the first base station control device, a handshake message to the second base station control device, and judging whether a response message returned by the second base station control device can be received; and if the response message returned by the second base station control device cannot be received, determining, by the first base station control device, that the cell under the control of the second base station control device needs to be controlled by the first base station control device. determining, by a first base station control device, that a cell under control of a second base station control device needs to be controlled by the first base station control device, wherein the first base station control device and the second base station control device belong to a same base station control device group; activating, by the first base station control device, configuration information of the cell backed up in the first base station control device; sending, by the first base station control device, an uplink signaling message to a core network node, wherein the uplink signaling message carries identity information of the cell; and after the core network node establishes a mapping relationship between the first base station control device and the cell according to the uplink signaling message, replacing, by the first base station control device, the second base station control device to control the cell, so as to provide communication services for a user equipment in the cell; wherein the determining, by the first base station control device, that the cell under the control of the second base station control device needs to be controlled by the first base station control device comprises: in a situation where the core network node works normally, sending, by the first base station control device, a handshake message to the second base station control device, and judging whether a response message returned by the second base station control device can be received; and if the response message returned by the second base station control device cannot be received, determining, by the first base station control device, that the cell under the control of the second base station control device needs to be controlled by the first base station control device. in a situation where the core network node works normally, sending, by the first base station control device, a handshake message to the second base station control device, and judging whether a response message returned by the second base station control device can be received; and if the response message returned by the second base station control device cannot be received, determining, by the first base station control device, that the cell under the control of the second base station control device needs to be controlled by the first base station control device.