We report on the results of the QW Ser campaign which has been continued from 2000 to 2003 by the VSNET collaboration team .
Four long outbursts and many short ones were caught during this period .
Our intensive photometric observations revealed superhumps with a period of 0.07700 ( 4 ) d during all four superoutbursts , proving the SU UMa nature of this star .
The recurrence cycles of the normal outbursts and the superoutbursts were measured to be \sim 50 days and 240 ( 30 ) days , respectively .
The change rate of the superhump period was -5.8 \times 10 ^ { -5 } .
The distance and the X-ray luminosity in the range of 0.5-2.4 keV are estimated to be 380 ( 60 ) pc and \log L _ { X } = 31.0 \pm 0.1 erg s ^ { -1 } .
These properties have typical values for an SU UMa-type dwarf nova with this superhump period .