A UV emission device includes an irradiator, a control unit, a determiner, and an exposure amount output unit. The irradiator irradiates a predetermined irradiation area in a predetermined space with ultraviolet rays. The control unit controls the irradiator based on a total exposure amount of a target person to ultraviolet rays. The determiner performs a determination process of determining whether or not the target person is present in the irradiation area. The exposure amount output unit outputs an amount of exposure of the target person to ultraviolet rays based on a determination result of the determiner and operation information on the irradiator. The control unit adds the amount of exposure of ultraviolet rays to the total exposure amount of ultraviolet rays in order to update the total exposure amount.