The invention discloses a device and a method for integrating well dredging and well flushing, and well logging of cement bond well cementing quality. The device comprises a continuous oil pipe, an ordinary oil pipe or a drill rod which extend into a petroleum well to be connected from top to bottom, wherein the continuous oil pipe, the ordinary oil pipe or the drill rod is connected with a protecting pipe through a rotating connector, and an instrument bunch which is centralized through a pair of centralizers is arranged in a pipe cavity of the protecting pipe; the end part of the protecting pipe is connected with a gauge cutter; a piston which is connected with the rotating connector through a shear pin is arranged in the pipe cavity of the protecting pipe, and the piston is connected with the instrument bunch; a locking mechanism is arranged between the piston and a piston rod, and an unlocking mechanism is arranged on the gauge cutter. A technology comprises two stages of the well dredging and the well flushing, and the well logging of cement bond well cementing quality. The integrated technology technique reduces the number of times that equipment enters the well, reduces the amount of well logging equipment, shortens the well logging time, reduces the equipment investment, and has good market application prospects.