A wireless LAN device and a method of monitoring the status of a wireless LAN are disclosed. The wireless LAN device according to the present invention can determine the status of a wireless LAN using a variety of information obtained by performing media access control (MAC) without additional packet transmission/reception with a correspondent wireless LAN device. Accordingly, if the wireless LAN device of the present invention is various kinds of wireless A/V (Audio/Video) devices that provide the A/V streaming, the data transmission can be optimally made in accordance with the status of the monitored wireless LAN. Further, since there is no additional communication needed to monitor the status of a wireless LAN, the present invention has advantages in that the processing speed of the wireless LAN device is improved and the traffic of the wireless LAN is not increased.