A handover method in a master-slave Wi-Fi network, wherein the master-slave network comprises a master device, a first slave device, a second slave device, and a user device, the first slave device is the current access device of the user device, and the method comprises: determining (step 303), by the master device, that the user device needs to be handed over from the current access device; determining (step 304), by the master device, that the user device is to be handed over to the second slave device; sending (step 305), by the master device to the second slave device, an identifier of a first network interface and an identifier of the user device that are received from the first slave device, the first network interface is a network interface allocated by the first slave device to the user device when the user device accesses the first slave device, and the identifier of the user device and the identifier of the first network interface are in a one-to-one correspondence and the identifier of the first network interface is a Basic Service Set Identification, BSSID; instructing (step 307), by the master device, the first slave device to send first network connection information to the second slave device, wherein the first network connection information is information used after the user device establishes a connection to the first network connection interface of the first slave device; sending (step 309), by the master device, a first handover command to the first slave device, and sending (step 309) a second handover command to the second slave device, wherein the first handover command is used to enable the first slave device to control the first network interface to be deactivated, and the second handover command is used to enable the second slave device to control a second network interface to be activated, wherein an identifier of the second network interface is the same as the identifier of the first network interface; wherein the first network connection information comprises at least one of a service set identifier, an encryption mode, key information, state machine information, address resolution protocol ARP information, or an Internet Protocol IP address; wherein the instructing, by the master device, the first slave device to send first network connection information to the second slave device comprises: sending, by the master device, instruction information to the first slave device, wherein the instruction information is used to instruct the first slave device to send the first network connection information to the second slave device. determining (step 303), by the master device, that the user device needs to be handed over from the current access device; determining (step 304), by the master device, that the user device is to be handed over to the second slave device; sending (step 305), by the master device to the second slave device, an identifier of a first network interface and an identifier of the user device that are received from the first slave device, the first network interface is a network interface allocated by the first slave device to the user device when the user device accesses the first slave device, and the identifier of the user device and the identifier of the first network interface are in a one-to-one correspondence and the identifier of the first network interface is a Basic Service Set Identification, BSSID; instructing (step 307), by the master device, the first slave device to send first network connection information to the second slave device, wherein the first network connection information is information used after the user device establishes a connection to the first network connection interface of the first slave device; sending (step 309), by the master device, a first handover command to the first slave device, and sending (step 309) a second handover command to the second slave device, wherein the first handover command is used to enable the first slave device to control the first network interface to be deactivated, and the second handover command is used to enable the second slave device to control a second network interface to be activated, wherein an identifier of the second network interface is the same as the identifier of the first network interface; wherein the first network connection information comprises at least one of a service set identifier, an encryption mode, key information, state machine information, address resolution protocol ARP information, or an Internet Protocol IP address; wherein the instructing, by the master device, the first slave device to send first network connection information to the second slave device comprises: sending, by the master device, instruction information to the first slave device, wherein the instruction information is used to instruct the first slave device to send the first network connection information to the second slave device.