The on-line cigarette quality detection set includes one electric part and one mechanical part. The electric part includes a display and a logic control unit connected via serial shielded communication cable and as the kernels, as well as a signal acquiring system and a signal logic treating and controlling unit. The signal logic treating and controlling unit comprising signal logic treating and controller receives the signal from the signal acquiring system and has output connected to the logic control unit and an eliminating system. The signal acquiring system consists of an empty head detecting unit and a no-filter tip monitoring unit and a sensor. The eliminating system is the mechanical part including an eliminating drum unit and a sensor installing unit. The present invention can eliminate cigarettes with loose head or no filter tip to raise cigarette quality.