A network access method, wherein the method comprises: detecting (301, 402), by a mobile wireless interconnection WiFi device, whether interference exists between a first channel and a second channel, wherein the first channel is between the mobile wireless interconnection WiFi device and a WiFi station, and the second channel is between the mobile wireless interconnection WiFi device and a WiFi hotspot; and when interference exists, reducing (302, 403), by the mobile wireless interconnection WiFi device, its own transmit power, so that no interference exists between the first channel and the second channel, and the WiFi station accesses the Internet by using the mobile wireless interconnection WiFi device and the WiFi hotspot, wherein said reducing comprises: reducing, by the mobile wireless interconnection WiFi device, its own transmit power level by level, and each time after its own transmit power is reduced, detecting whether interference exists between the first channel and the second channel, until no interference exists between the first channel and the second channel; or reducing, by the mobile wireless interconnection WiFi device according to a preset value, its own transmit power by the preset value, so that no interference exists between the first channel and the second channel; and when interference still exists between the first channel and the second channel, re-switching, by the mobile wireless interconnection WiFi device, the first channel between the mobile wireless interconnection WiFi device and the WiFi station. detecting (301, 402), by a mobile wireless interconnection WiFi device, whether interference exists between a first channel and a second channel, wherein the first channel is between the mobile wireless interconnection WiFi device and a WiFi station, and the second channel is between the mobile wireless interconnection WiFi device and a WiFi hotspot; and when interference exists, reducing (302, 403), by the mobile wireless interconnection WiFi device, its own transmit power, so that no interference exists between the first channel and the second channel, and the WiFi station accesses the Internet by using the mobile wireless interconnection WiFi device and the WiFi hotspot, wherein said reducing comprises: reducing, by the mobile wireless interconnection WiFi device, its own transmit power level by level, and each time after its own transmit power is reduced, detecting whether interference exists between the first channel and the second channel, until no interference exists between the first channel and the second channel; or reducing, by the mobile wireless interconnection WiFi device according to a preset value, its own transmit power by the preset value, so that no interference exists between the first channel and the second channel; and reducing, by the mobile wireless interconnection WiFi device, its own transmit power level by level, and each time after its own transmit power is reduced, detecting whether interference exists between the first channel and the second channel, until no interference exists between the first channel and the second channel; or reducing, by the mobile wireless interconnection WiFi device according to a preset value, its own transmit power by the preset value, so that no interference exists between the first channel and the second channel; and when interference still exists between the first channel and the second channel, re-switching, by the mobile wireless interconnection WiFi device, the first channel between the mobile wireless interconnection WiFi device and the WiFi station.