A plurality of drone main bodies 100, a control unit 106 capable of controlling the plurality of drone main bodies, a wing mounting frame 104 coupled to the plurality of drone main bodies, and the plurality of wing mounting frames 104 A plurality of lower frames 105 configured to support the ground when landing, a plurality of connection frames 102 formed perpendicular to the plurality of lower mounting frames 105, and the plurality of connection frames 102 A plurality of upper frames (101), which are vertically coupled to and configured to prevent collisions with obstacles, and a module frame (103) that is connected to the plurality of wing mounting frames (104) and to which the control unit (106) can be coupled. And for connection between the plurality of frames may be composed of a fastening unit 110 including a coupling groove detachable with each of the plurality of frames, and furthermore, an image recording device, a control device, a radar radar sensor and a lamp in the module frame It may further include, and the control unit 106 is a multi-purpose drone, characterized in that it further comprises a special software capable of converting into a 3D model by synthesizing and analyzing the recorded record taken from the video recording and recording device, as a multi-purpose drone that checks the exterior of the lower part of the bridge. And it relates to a drone, characterized in that the frame guard 111 is mounted on the outside of the propeller to prevent collision with an obstacle during inspection.
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