This invention provides an intelligent road smoothness measuring device, comprising a walking mechanism, a detection mechanism, a lifting mechanism, and a sweeping mechanism. The detection mechanism is detachably mounted on the walking mechanism. The lifting mechanism is located at one end of the walking mechanism. The sweeping mechanism is slidably connected to the lifting mechanism. The sweeping mechanism includes a dust collection component, a roller
brush, and two rotating rods. The dust collection component is slidably connected to the lifting mechanism, and a locking block is provided on each side of the dust collection hopper of the dust collection component. One end of each of the two rotating rods is hinged to both sides of the dust collection hopper of the dust collection component, and the other end of each rotating rod extends obliquely downward away from the dust collection component and is rotatably connected to both ends of the roller
brush. The rotating rods are locked onto the locking blocks. A first motor for driving the roller
brush rotation is provided at the end of the rotating rod near the roller brush. This invention can not only intelligently measure road smoothness but also sweep and collect debris from the
road surface, effectively improving detection accuracy.