The invention discloses a sweeper and a sweeping device for the same. The sweeping device comprises a synchronous belt transmission mechanism, an annular rail and at least three sweeping mechanisms and is characterized in that the synchronous belt transmission mechanism comprises belt wheels and a synchronous belt; the annular rail is mounted on the periphery of the synchronous belt in an annularand sealed manner, and an interval exists between the annular rail and the synchronous belt; each sweeping mechanism comprises a shell, a second motor, a sweeping brush plate and a connecting part, the shell is located below the annular rail, the second motor is located in the shell and can drives the sweeping brush plate to rotate, the connecting part is mounted at the top of the shell, the sweeping mechanism freely moves along the annular rail through the connecting part, and the inner side of the connecting part is hinged to a connector fixed on the synchronous belt; the sweeping mechanismsare distributed along the annular rail in an equal-distance manner. The sweeping device has the advantages that a first motor drives the sweeping brush plates to rotate around the two belt wheels, the second motors drive the sweeping brush plates to perform self-rotation, the floor which the sweeper passes by can be swept, and sweeping missing hardly occurs.