A scanning method of a multiple input multiple output, MIMO, communication apparatus, the method comprising: receiving a request to scan a first channel using a first antenna and to scan a second channel using a second antenna; wherein if the first channel and second channel scanning is active scanning, the method comprises performing active scanning, wherein active scanning comprises: generating a first search frame in order to scan the first channel and a second search frame in order to scan the second channel; and simultaneously transmitting the first search frame using the first antenna and the second search frame using the second antenna; wherein the first channel is individually scanned by transmitting the first search frame by the first antenna to the first channel, and the second channel is individually scanned by transmitting the second search frame by the second antenna to the second channel, wherein if there exists a channel, among the first channel and the second channel assigned to the first antenna and the second antenna, over which a reception event occurs, the scanning the first channel and the second channel further comprises: assigning a new channel to the antenna assigned to the channel over which the reception event occurred; and transmitting a search frame through the antenna assigned to the new channel, wherein the reception event is receiving a response frame to the transmitted search frame; and wherein if the first channel and second channel scanning is passive scanning, the method comprises performing passive scanning, wherein the passive scanning comprises: assigning different channels to the first antenna and the second antenna, respectively; and waiting to receive a beacon frame through the first antenna and the second antenna. receiving a request to scan a first channel using a first antenna and to scan a second channel using a second antenna; wherein if the first channel and second channel scanning is active scanning, the method comprises performing active scanning, wherein active scanning comprises: generating a first search frame in order to scan the first channel and a second search frame in order to scan the second channel; and simultaneously transmitting the first search frame using the first antenna and the second search frame using the second antenna; generating a first search frame in order to scan the first channel and a second search frame in order to scan the second channel; and simultaneously transmitting the first search frame using the first antenna and the second search frame using the second antenna; wherein the first channel is individually scanned by transmitting the first search frame by the first antenna to the first channel, and the second channel is individually scanned by transmitting the second search frame by the second antenna to the second channel, wherein if there exists a channel, among the first channel and the second channel assigned to the first antenna and the second antenna, over which a reception event occurs, the scanning the first channel and the second channel further comprises: assigning a new channel to the antenna assigned to the channel over which the reception event occurred; and transmitting a search frame through the antenna assigned to the new channel, assigning a new channel to the antenna assigned to the channel over which the reception event occurred; and transmitting a search frame through the antenna assigned to the new channel, wherein the reception event is receiving a response frame to the transmitted search frame; and wherein if the first channel and second channel scanning is passive scanning, the method comprises performing passive scanning, wherein the passive scanning comprises: assigning different channels to the first antenna and the second antenna, respectively; and waiting to receive a beacon frame through the first antenna and the second antenna. assigning different channels to the first antenna and the second antenna, respectively; and waiting to receive a beacon frame through the first antenna and the second antenna.