The present invention discloses a method for controlling wireless network devices, which includes the following steps: a control device with a wireless network function is utilized to scan several access-point (AP) mode wireless network devices. One of the AP mode wireless network devices is selected as a master AP according to the scanning result. The at least one AP mode wireless network device other than the selected one is set to a client mode. The at least one wireless network device set to the client mode builds a connection to the control device with a wireless network function through the master AP. The present invention also discloses a control device with a wireless network function.