The paper describes the current WLAN network security using the testing and congestion control method

then suggests a WLAN test system and congestion control strategy based on cross-AC switching.Through proposing a WLAN cross-AC switching devices

an AP can be switched to each AC for achieving the test task.The use of the double contrast analysis method based on AP testing results and the AC log

the APs connecting the vSwitch can be rapidly switched to the backup AC

which maximum shorts of the WLAN network congestion duration

and effectively avoids the congestion of WLAN AC.Ultimately the user’s network-aware is enhanced.