Defect&hazard analysis software is developed for analysis of the defects and hidden dangers within channel patrol and refinement patrol. It achieves the transformation from outdoor shooting and composing report by manpower to UAV assist shooting and auto-generated report, and improves the efficiency of the analysis defects& hazards of channel patrol, as well as saves labor and material cost. Based on image algorithm and CAD drawing technique, this software examines and analyzes the hidden dangers within the rage of transmission line channels, such as construction black spots, mountain fires, landslides and the defects of pole and tower parts , and accurately records the location of defects. According to the standard defect database of State Grid or China Southern Grid, the defects will be classified and displayed in the automatic report.