A communication system, comprising: a wearable device; and a user equipment configured to: directly establish a first communication connection with the wearable device, the first communication connection comprises a BLUETOOTH connection; directly establish a second communication connection with a first device; and send first configuration information to the first device, where the first configuration information comprises a Bluetooth address of the wearable device and a key for communication between the first device and the wearable device, send second configuration information of the first device to the wearable device via the first communication connection, wherein the second configuration information comprises a BLUETOOTH address of the first device; wherein the wearable device is configured to directly establish a third communication connection with the first device according the second configuration information, wherein the third communication connection comprises a BLUETOOTH connection; wherein the user equipment is further configured to send a first message to the wearable device via the second communication connection and the third communication connection in a case that the first communication connection is disconnected; wherein the wearable device is further configured to: receive the first message via the second communication connection and the third communication connection; wherein the user equipment is further configured to: establish a direct BLUETOOTH connection between the user equipment and the wearable device in a case that a BLUETOOTH signal of the wearable device is detected by the user equipment after the first communication connection is disconnected; send a second message to the wearable device via the direct BLUETOOTH connection; and wherein the wearable device is further configured to: receive the second message via the direct BLUETOOTH connection. a wearable device; and a user equipment configured to: directly establish a first communication connection with the wearable device, the first communication connection comprises a BLUETOOTH connection; directly establish a second communication connection with a first device; and send first configuration information to the first device, where the first configuration information comprises a Bluetooth address of the wearable device and a key for communication between the first device and the wearable device, send second configuration information of the first device to the wearable device via the first communication connection, wherein the second configuration information comprises a BLUETOOTH address of the first device; directly establish a first communication connection with the wearable device, the first communication connection comprises a BLUETOOTH connection; directly establish a second communication connection with a first device; and send first configuration information to the first device, where the first configuration information comprises a Bluetooth address of the wearable device and a key for communication between the first device and the wearable device, send second configuration information of the first device to the wearable device via the first communication connection, wherein the second configuration information comprises a BLUETOOTH address of the first device; wherein the wearable device is configured to directly establish a third communication connection with the first device according the second configuration information, wherein the third communication connection comprises a BLUETOOTH connection; wherein the user equipment is further configured to send a first message to the wearable device via the second communication connection and the third communication connection in a case that the first communication connection is disconnected; wherein the wearable device is further configured to: receive the first message via the second communication connection and the third communication connection; wherein the user equipment is further configured to: establish a direct BLUETOOTH connection between the user equipment and the wearable device in a case that a BLUETOOTH signal of the wearable device is detected by the user equipment after the first communication connection is disconnected; send a second message to the wearable device via the direct BLUETOOTH connection; and wherein the wearable device is further configured to: receive the second message via the direct BLUETOOTH connection. send a second message to the wearable device via the direct BLUETOOTH connection; and wherein the wearable device is further configured to: receive the second message via the direct BLUETOOTH connection.