The invention relates to electro-fusion welding of a polyethylene pipeline, and aims to provide an electro-fusion welding machine for realizing welding quality monitoring through a wireless network and a method for realizing electro-fusion welding quality monitoring through the wireless network. The electro-fusion welding machine comprises a microprocessor connected with an electro-fusion welding machine main body and an identity authentication module, and an abnormal condition alarm module and a wireless data receiving and transmitting module which are connected with the microprocessor respectively, wherein a quality monitoring program is arranged in the microprocessor. The method comprises the following steps: identity authentication and qualification affirmation of a welder, welding engineering project management, welding parameter management, pre-examination before welding, control of the welding quality and the like. Welding quality management of an electro-fusion welding joint of the polyethylene pipeline, including pipeline joint positioning, welder qualification verification, welding data storage, welding quality verification and the like can be realized; and welder qualification, level management and welding engineering project management can be realized.