Embodiments of the present invention provide a wireless local area network (WLAN) transmission control method, a device and a system. The WLAN transmission control method includes: receiving, by a WLAN device, configuration information sent by a cloud control device, where the configuration information includes a control plane forwarding rule and a data plane forwarding rule (A10); performing, by the WLAN device, configuration of a control plane network algorithm according to the control plane forwarding rule, and performing configuration of a data plane network algorithm according to the data plane forwarding rule (A20); sending, by the WLAN device, a received control signaling according to the control plane network algorithm, and sending received service data according to the data plane network algorithm (A30). By applying the present invention, rapid deployment of configuration and separation of the control plane from the data plane are achieved, thereby improving the performance of the WLAN system.