Abstract: A Set Top Box (STB), a net conference terminal, a method, an apparatus and a system for processing network Quality of Service (QoS) are disclosed. The method for processing network QoS includes: obtaining actual usage information of network quality parameters; and obtaining descriptive information of network QoS according to the actual usage information of the network quality parameters. The network QoS processing apparatus includes: a first obtaining module, configured to obtain actual usage information of the network quality parameters which include transmission bandwidth, and network delay and/or network packet loss ratio; and a second obtaining module, configured to obtain descriptive information of network QoS according to the actual usage information of the network quality parameters. The network QoS processing system includes a communication network and a network QoS processing apparatus located in the communication network.