In order to solve the problems about poor reliability of sensor power supply and difficult data transmission existing in operation and maintenance of transmission line in high altitude area

a intelligent inspection method of transmission line based on heterogeneous Internet of Things (IoT) is proposed. Firstly

the sensor power supply technology of wind-photovoltaic cooperation is studied

and the reliable power supply of transmission line monitoring sensor in high altitude area under harsh environment is realized. Secondly

the heterogeneous IoT for transmission line is established to realize the data acquisition of transmission line without mobile signal sensor. On this basis

through analyzing the collected data samples by deep learning

the intelligent inspection of transmission lines is realized. Finally

the proposed method is applied to a 110 kV line in no signal area

and the results verify the effectiveness and feasibility of the proposed method.