Abstract: Fugitive odor emission behavior from sour water tanks and product intermediate tanks were comprehensively monitored and evaluated in a typical refinery. The comprehensive measures including reducing emissions of exhaust gas in tanks area and the absorbing process by low temperature distillate oils followed by desulfurization are used. The main odor pollutant in the tanks area is hydrogen sulfide, methyl mercaptan, ethyl mercaptan and dimethyl disulfide as well as non-methane hydrocarbons (NMHC). It is found that the hydrogen sulfide concentration in sour water tank is 175—3.36×103 mg/m3, organic sulfur compound concentration is 112-1.39×103 mg/m3, NMHC concentration is（2.67-4.40）×105 mg/m3. After purified by absorbing processe of low temperature distillate oils and then desulfurization, hydrogen sulfide concentration can be below 1 mg/m3, and purification efficiency reaches up to 99.9%. The organic sulfur compound concentration is less than 0.6mg/m3, and purification efficiency is greater than 99.5%. NMHC concentration is lower than 2.35×104 mg/m3, and purification efficiency reached as high as 95.1%.