The present invention relates to a mobile bridge cable inspection device, comprising: a hard frame combined in a square shape to surround the circumference of a bridge cable for this purpose; and a moving means mounted on each corner of the hard frame to move along the surface of the bridge cable; And, an image acquisition unit coupled to the upper or lower end of each moving means to obtain an image of the surface of the bridge cable; Doedoe including a first communication module; wherein the moving means has a traveling part whose length is variable in the radial direction of the bridge cable according to the diameter of the bridge cable, and the image acquisition part is selected from a 3D camera, a scanner camera, and a CCTV. One, and the hard frame is characterized in that the moving means, the image acquisition unit, at least two or more batteries to supply power to the first communication module, and an encoder for measuring the mileage of the moving means are mounted.
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