[en] The radon concentration is higher in the underground facilities than in the open space. In order to protect people who live or work in the underground space from radiation hazard, the radon reduction practice has become a necessity. Presently, active carbon radon adsorption technique and electric radon elimination technique are the two main techniques used in the radon reduction area. Active carbon adsorption device would take too much space and be high energy consumption when high efficiency was needed. Electric radon elimination technique had high efficiency in eliminating combined type radon decay products, but it had no influence on the concentration of radon and uncombined type radon decay products. Based on the present technique, metal-organic frameworks (MOFs) and membrane gas separation module were introduced and the possibilities of these new materials and technique were also analyzed. (authors)