The traditional drainage gas recovery process has problemssuch asuntimely effusion warning, delayed drainage intervention, high labor intensityandsystem optimization.According to actual downhole flow pressure data of twenty one wells，level 3 classification criteria for fluid accumulation were established for the comprehensive identification, which has proved to be as efficient as 95% from the application in 158 wells.Then intelligent decision-making system has been built combining technical application limit andeconomicanalysis.Through the method such as computer programming,industrial automation control,internet, the organic integration of intelligent decision-making system and drainage gas recovery has been achieved and succeeded in two wells in Zhongjiang gas-field.It has been successfully applied in Well JS 203-7 HF and JS104-3HF and has realized automatic collection of wellhead pressure data, automatic identification of liquid accumulation degree in gas wells, automatic judgment of liquid drainage and gas recovery measures, and self-adjustment of liquid and gas recovery parameters.The decline rate of well JS203-7HF decreased from 76.00 to 6.37 cubic meters per day.Well JS104-3HF achieves stable drainage, with daily production of 3000 cubic meters per day.The intelligent decision-making system and intelligent drainage and gas recovery device can effectively reduce the decline rate of gas production and improve the final gas recovery rate. It is a good reference fortight sandstone gas reservoirs and shale gas reservoirs.