This freshness maintaining system (1) comprises: a freshness detection unit (2) which detects ethylene gas and detects the freshness of a crop; and a maturation suppression unit (3) which emits light having a sterilizing function. A processing unit (11) of the freshness maintaining system (1) controls the maturation suppression unit (3) on the basis of the freshness detected by the freshness detection unit (2) and suppresses the freshness of the crop. Accordingly, when a crop is being stored or displayed in a store, etc., it is possible to suppress the progress of maturation and maintain the freshness of the crop.

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