Abstract: The Brewer ozone spectrophotometer ,which is recommended by the World Meteorological Organization(WMO), at Zhongshan station(69.37°S,76.38°E),Antarctica first provides hourly ground based measurements of O 3,UV B at the earth surface in the 93 “Ozone Hole”.These measurements define the column ozone abundance and the UV B radiation environment of the region and ,in conjunction with a daily record of sky conditions and the upper atmospheric temperature, permit a general understanding of the close relationship between the ozone and stratospheric temperature and the role of ozone and cloud cover in regulating UV B radiation levels at the Antarctica surface in the period of the ozone depletion. The processes of low column ozone abundance (near or below 220DU) have been detected from August to the end of November,and a normal abundance (near or above 260DU)recovers at the beginning of December.High coherent variations between the ozone column abundance and the temperature from 70hPa to 50hPa altitude are very obivious.Daily variations of UV B radiation are greatly controlled by the solar zenith angle(SZA),ozone and the sky conditions.Preliminary statistical analyses tell us that noontime biologically weighted damaging UV B(damaging UV B,DUV B) flux is a negative exponential function of slant ozone column abundance. Spectra scanning presents that in the range of UV B, ground surface irradiance of shorter wavelength is more easily influenced by the changes of the above ozone column abundance. Avoiding from the variability associated with cloud cover aerosols,and albedo etc., the ratio of noontime irradiance for 300.5nm to that for 323.5nm shows that ozone is one of the most important factors for UV B enhancing during the ozone depletion period.