A repeating method of a wireless repeating device, wherein the method comprises the following steps: synchronizing network connection information of an upstream Access point, AP, to a downstream Wireless Local Area Network, WLAN, AP interface of the wireless repeating device after the wireless repeating device establishes a connection with the upstream AP; obtaining, according to the downstream WLAN AP interface corresponding to the synchronized upstream AP, downstream wireless station, STA, Medium Access Control, MAC, address information and establishing an upstream WLAN Client interface which is in a mapping relationship with the downstream wireless STA MAC address; and performing, according to the mapping relationship between the downstream wireless STA MAC address and the established upstream WLAN Client interface, management on data forwarded between the upstream AP and the downstream wireless STA; wherein when the data is service data and the service data is from the upstream AP to the downstream wireless STA, the step of performing, according to the mapping relationship between the downstream wireless STA MAC address and the established upstream WLAN Client interface, the management on the data forwarded between the upstream AP and the downstream wireless STA specifically is: through the upstream WLAN Client interface, receiving service data sent by the upstream AP; according to the mapping relationship between the downstream wireless STA MAC address and the established upstream WLAN Client interface, searching for a downstream wireless STA corresponding to the upstream WLAN Client interface, and mapping a destination address corresponding to the service data into the downstream wireless STA MAC address; and through the downstream WLAN AP interface, sending the mapped service data to the downstream wireless STA. synchronizing network connection information of an upstream Access point, AP, to a downstream Wireless Local Area Network, WLAN, AP interface of the wireless repeating device after the wireless repeating device establishes a connection with the upstream AP; obtaining, according to the downstream WLAN AP interface corresponding to the synchronized upstream AP, downstream wireless station, STA, Medium Access Control, MAC, address information and establishing an upstream WLAN Client interface which is in a mapping relationship with the downstream wireless STA MAC address; and performing, according to the mapping relationship between the downstream wireless STA MAC address and the established upstream WLAN Client interface, management on data forwarded between the upstream AP and the downstream wireless STA; through the upstream WLAN Client interface, receiving service data sent by the upstream AP; according to the mapping relationship between the downstream wireless STA MAC address and the established upstream WLAN Client interface, searching for a downstream wireless STA corresponding to the upstream WLAN Client interface, and mapping a destination address corresponding to the service data into the downstream wireless STA MAC address; and through the downstream WLAN AP interface, sending the mapped service data to the downstream wireless STA.