Abstract: The wet oil and gas recovering installation, which is a hermatic installation for oil and gas recovery, will use Sovel Liquid(a specially made liquid)to absorb petroleum vapour and is suitable to install on oil loading system for truck tankers. It has been practically tested that the recovering rate could be reached at more than 90%. The installatien has an advanced precess and mainly two circulating systems for Sovel Liquid and gasoline. It can be operated and controlled by preset programable controller and can be operated safely and reliably by self-diagnostic fuction and self-protective system. So that it can be applied in the field of light oil loading and unloading operation.