Disclosed are a scheduling method, device and system based on quality of service. The method includes: for downlink service data, an access point (AP) or a gateway (GW) determines the quality of service (QoS) level of a downlink service packet of a media access control (MAC) layer according to the QoS attribute information of the downlink service packet of the IP layer, and then the AP transmits and schedules radio resources according to the QoS level; for uplink service data, user equipment (UE) determines the QoS level of an uplink service packet of the MAC layer according to the QoS attribute information of the uplink service packet of the IP layer, and reports the QoS level and the other QoS parameters to the AP in the manner of a scheduling request, and the AP completes the transmitting and scheduling of radio resources according to the QoS level, so that the UE transmits the uplink service data to the AP. Aimed at low-cost hot spot and indoor data service access, the present invention provides a novel network architecture and a perfect QoS service mechanism.