Underground sewers are often prone to problems, which is a very difficult problem for the government. This UAV solves this problem and can conveniently survey the problems of underground sewers for better maintenance. This design better integrates camera/sensor/light/paddle/motor/battery/circuit board and other components. The overall shape adopts simple geometry, and the middle body modifies the lines on the basis of spherical shape. It is irregular spherical, simple but not simple, and has strong visual impact.