The invention relates to a power transmission line inspection system, in particular to an unmanned aerial vehicle intelligent inspection system for a power transmission line. The problem that an existing power transmission line inspection system lacks a reasonable network topology structure is solved. The unmanned aerial vehicle intelligent inspection system for the power transmission line comprises a plurality of unmanned aerial vehicles, an image data access server, a video data access server, an auxiliary data access server, a first data storage server, a second data storage server, a datapreprocessing engine, a feature extraction engine, a tower characteristic matching engine, a wire characteristic matching engine, an insulator characteristic matching engine, a bird nest characteristic matching engine, a tower fault detection engine, a wire fault detection engine, an insulator fault detection engine, a typical target database server, a typical fault database server, a first CAN bus, a second CAN bus and a third CAN bus. The system is suitable for power transmission line inspection.