Abstract: During the operation process of tankfarm.vapor emission usually takes place in the three stages of unloading,storage and sending-receiving oil.The oil vapor in gas stations mainly comes from vapor emission during unloading and refueling of oil.While the oil emissions from vehicles usually come from the gas emissions in the daytime,travelling and refueling.Based on the above phenomena,the key locations of oil & gas recovery in oil products tank,gas station and vehicles are focused on.By far.there are 5 methods to recover oil & gas in total;that is,absorption,adsorption,condensation,membrane separation and oxidation combustion.History in oil & gas recovery research abroad is more than 50 years,and numerous relatively mature techniques can be seen as a result of the research.Conventionally,oil & gas recovery equipment for oil products tankfarm is designed based on activated carbon adsorption method or other special absorbent absorption process;the recovery equipment used in gas station is mainly based on condensation and membrane separation process for recycling the gas or oil independently or Class-Ⅰ vapor recovery system.While for vehicles,the recovery equipment is composed by Class-Ⅱ oil recovery system and car oil recovery system.