Single LAN interface wireless router performance testing system and method

The invention discloses a single LAN (Local Area Network) interface wireless router performance testing system. The single LAN interface wireless router performance testing system is used for carrying out a performance test on a device under test. The device under test comprises a wireless interface, a first interface and a second interface; the testing system comprises a first terminal, a second terminal and a third terminal, wherein the first terminal comprises a first network adaptor which is connected with the wireless interface of the device under test; the second terminal comprises a second network adaptor which is connected with the first interface of the device under test; the third terminal comprises a third network adaptor which is connected with the second interface of the device under test. The invention further discloses a performance testing method. The single LAN interface wireless router performance testing system and the method disclosed by the invention can adapt to the wireless router with only one WAN (Wide Area Network) interface and one LAN interface as well as the wireless function, and enable the wireless router to be carried out with the performance test under the full load working condition.