The Nanshan One- meter Wide-field Telescope (NOWT) was installed in March 2012. One of the noticeable constructs of NOWT is the Alt-Az mount working at prime focus with field corrector. The effective size of field-of-view (FOV) is 1.37 degree×1.37 degree. Meanwhile the detector is attached above a derotation unit and a filter wheel. The 5-position filter wheel contains standard Johnson-Cousins (UBVRI), Sloan Digital Sky Survey (u’g’r’i’z’) or Stromgren (uvby).