A method, system and game server for recommending a game room are disclosed. The method includes: a speed measuring server measuring a network speed from a network user logging on an IDC in which the speed measuring server is located to the IDC, counting an average of network speeds from all network users in a same subnet to the IDC; the speed measuring server sending the average of network speeds to a QoS center, the QoS center allocating, according to the average of network speeds and a predetermined principle, a QoS level to a communication link from each subnet to each IDC, sending the QoS level to a game server in each IDC; and the game server sending information of a recommended game room to a game client according to the QoS level of the communication link from the subnet to which the game client belongs to each IDC.