The invention relates to a mobile query terminal for transmission line data. The mobile query terminal comprises a microprocessor, a storer, an input module and a display. The microprocessor is connected with the storer, the input module and the display. The output end of a COMS image sensor is connected with the input end of an image recognizer. The output end of the image recognizer and the output end of a GPS positioning module are connected with the input end of the storer. The microprocessor is connected with a pole and tower database server through a wife module. When a transmission line fault occurs, fault location related data of fault location pole and tower types, pole and tower materials, insulator types, wire types, grounding forms, foundation forms, geological landforms and the like can be quickly queried, in this way, a lot of query time is saved, fault repair time is shortened, and working efficiency is enhanced. Meanwhile, new or modified information on the transmission line can be added and supplemented at any time, convenience and flexibility are achieved, time is saved, and cost is lowered.