The invention relates to the technical field of gas purification, in particular to a digital gas purification system and method, and aims to solve the problem of deviation between a detection value and a practical value since purity index data of organic gas purified with ionic liquid vary under the influences of other environmental factors such as temperature and air pressure. The digital gas purification system is technically characterized by comprising a separation chamber, a first circulation pipeline, a second circulation pipeline and a control subsystem, wherein the control subsystem comprises multiple groups of digital sensors, actuators and control ends; and the control ends are used for comparing index real-time data detected by the digital sensors with corresponding index targetdata, and controlling the actuators to act, thereby preventing organic gas purity data from changing under the influences of other environmental parameters such as temperature, and improving the purification accuracy, wherein the index real-time data include organic gas purity data and environmental parameter data, and the index target data include target parameter data corresponding to the indexreal-time data.