A network quality detection method and device, a network element device, a computer device, and a computer readable medium. The method comprises: separately sending a subscription command to an ingress network element device and an egress network element device of a service flow, the subscription command comprising at least a detection type and a reporting period, so that network element devices bearing the service flow send data according to the detection type and the reporting period; receiving the data sent by the network element devices; determining the path of the service flow according to the data; and detecting the network quality of the path according to the data and a predetermined indicator threshold.