During the period of June, 2005—May, 2006 (a year total), atmosphere swatch, aerosol swatch and rainwater swatch were collected in suburban of Nanjing. The measurement was conducted at the observatory of Pukou schoolhouse of Nanjing University. Surface layer weather conditions were observed synchronously. Nitride (NOX+NH3) in the atmosphere, nitrate, nitrite and ammonium in TSP (Total Suspended Particles), the NO-3 and NH+4 in rainwater and ON (organic nitrogen) were analyzed in the laboratory. Dry depositional velocity of atmospheric nitric contamination was counted using both measurement and modeling, then atmospheric nitrogen depositional flux could be estimated. The results show that the concentration of ON is relatively high whereas that of IN (inorganic nitrogen) is relatively low, and also the atmospheric nitrogen deposition flux in suburban of Nanjing is quite remarkable because wet deposition and organic deposition are relatively large, which are related to the landuse type and air pollution situation as well as the weather condition.