A device with the function of automatic adjusting ozone emission and an operation method thereof are provided. The device includes an ozone sensor, a photoinduced ozone module, a blower module, and a control circuit. The ozone sensor measures the concentration of ozone in the air. The photoinduced ozone module generates ozone in the wind flow path of the device via photolysis. The blower module creates a wind flow in the wind flow path. The control circuit controls the photoinduced ozone module according to the ozone concentration to adjust the ozone yield, or controls the blower module according to the ozone concentration to adjust the flowrate of the wind flow, or controls the photoinduced ozone module and the blower module according to the ozone concentration to adjust the ozone yield and the flowrate.一種可自動調整臭氧排放濃度的裝置及其操作方法。所述裝置包括臭氧感測器、光生臭氧模組、送風模組以及控制電路。臭氧感測器感測空氣中的臭氧濃度。光生臭氧模組藉由光解反應在所述裝置的風流路徑中產生臭氧。送風模組在所述風流路徑中製造風流。控制電路依照所述臭氧濃度對應控制所述光生臭氧模組以調整臭氧產率,或是依照所述臭氧濃度對應控制所述送風模組以調整所述風流的風量,或是依照所述臭氧濃度對應控制所述光生臭氧模組與所述送風模組以調整所述臭氧產率與所述風量。