A channel selection method for a wireless device, comprises: defining at least one wireless access group, assigning a plurality of wireless devices which are adjacent to each other to a same wireless access group, selecting one of the wireless devices from each of the wireless access groups as a channel selection device, enabling a wireless access control function of the channel selection device, and the remaining wireless devices in the wireless access group function as adjacent access devices, and the method further comprises: Step S1, the channel selection device launches into an operating state of an automatic channel selection function; Step S2, the channel selection device scans all of the adjacent access devices in the same wireless access group, and sends a state query request to each of the adjacent access devices respectively; Step S3, the channel selection device judges whether any of the adjacent access devices in the same wireless access group is in the operating state of the automatic channel selection function by feedback information for the state query request; if the result of the judgement in Step S3 shows "No", turning to Step S5 and else turning to Step S4; Step S4, the channel selection device switches into a waiting state of the automatic channel selection function, and returning to Step S2 after a predefined first delay; Step S5, the channel selection device maintains in the operating state of the automatic channel selection function, and executes an automatic channel selection, and then the channel selection device exits the operating state of the automatic channel selection function; characterized in that in Step S4, when the channel selection device is in the waiting state of the automatic channel selection function, the channel selection device starts a timing until a predefined first delay is reached, the channel selection device sends again the state query requests to all of the adjacent access devices in the same wireless access group, so as to repeat the process of querying the current state of the adjacent access device until none of the adjacent access devices is in the operating state of the automatic channel selection function. assigning a plurality of wireless devices which are adjacent to each other to a same wireless access group, selecting one of the wireless devices from each of the wireless access groups as a channel selection device, enabling a wireless access control function of the channel selection device, and the remaining wireless devices in the wireless access group function as adjacent access devices, and the method further comprises: Step S1, the channel selection device launches into an operating state of an automatic channel selection function; Step S2, the channel selection device scans all of the adjacent access devices in the same wireless access group, and sends a state query request to each of the adjacent access devices respectively; Step S3, the channel selection device judges whether any of the adjacent access devices in the same wireless access group is in the operating state of the automatic channel selection function by feedback information for the state query request; if the result of the judgement in Step S3 shows "No", turning to Step S5 and else turning to Step S4; Step S4, the channel selection device switches into a waiting state of the automatic channel selection function, and returning to Step S2 after a predefined first delay; Step S5, the channel selection device maintains in the operating state of the automatic channel selection function, and executes an automatic channel selection, and then the channel selection device exits the operating state of the automatic channel selection function; Step S1, the channel selection device launches into an operating state of an automatic channel selection function; Step S2, the channel selection device scans all of the adjacent access devices in the same wireless access group, and sends a state query request to each of the adjacent access devices respectively; Step S3, the channel selection device judges whether any of the adjacent access devices in the same wireless access group is in the operating state of the automatic channel selection function by feedback information for the state query request; if the result of the judgement in Step S3 shows "No", turning to Step S5 and else turning to Step S4; Step S4, the channel selection device switches into a waiting state of the automatic channel selection function, and returning to Step S2 after a predefined first delay; Step S5, the channel selection device maintains in the operating state of the automatic channel selection function, and executes an automatic channel selection, and then the channel selection device exits the operating state of the automatic channel selection function;