A multi-functional fresh-keeping device and a control method therefor and a refrigeration device. The multi-functional fresh-keeping device comprises an ionizer (110), a fresh-keeping mode circuit, a disinfecting mode circuit and a control system. The control system is connected to the ionizer (110) by means of the fresh-keeping mode circuit and the disinfecting mode circuit respectively. The multi-functional fresh-keeping device further comprises a filtering module (120) and an air supply mechanism (130) that are connected to the control system. The filtering module (120) is used for purifying air, and the air supply mechanism (130) is used for accelerating gas circulation. When the control system controls the ionizer (110) to work by means of the fresh-keeping mode circuit, the control system controls the air supply mechanism (130) to work at the same time when the control system controls the ionizer (110) to work by means of the disinfecting mode circuit, the control system controls the air supply mechanism (130) to shut down at the same time. The multi-functional fresh-keeping device has the advantages that the selection is flexible, the all-round fresh-keeping, disinfecting and purifying effects on food can be achieved, and food storage quality is greatly improved.La présente invention concerne un dispositif de conservation au frais multi-fonctionnel et son procédé de commande et un dispositif de réfrigération. Le dispositif de conservation au frais multi-fonctionnel comprend un ioniseur (110), un circuit de mode de conservation au frais, un circuit de mode de désinfection et un système de commande. Le système de commande est raccordé au ioniseur (110) au moyen du circuit de mode de conservation au frais et du circuit de mode de désinfection, respectivement. Le dispositif de conservation au frais multi-fonctionnel comprend en outre un module de filtration (120) et un mécanisme dalimentation en air (130) qui sont raccordés au système de commande. Le module de fi
