A non-agile channelization method for multichannel medium access control (MAC) is provided, in which an available channel is categorized as an agile or non-agile channel, an operation mode of the channel categorized as the non-agile channel is selected, and multichannel switching is performed according to the selected operation mode. The non-agile channelization method for multichannel MAC enables non-agile channel switching to create a connected network, and allows agile and non-agile channel switching to coexist to avoid a change in existing hardware.