A nebulization system, comprising: a power adapter; and a nebulizer adapted to be detachably connected to the power adapter, comprising: a nebulization module having an accommodation room for placing a liquid; and a nebulization driving device connecting to the nebulization module and comprising: a battery unit; an input terminal coupled to the power adapter and the battery unit; characterized by a voltage detection unit coupled to the input terminal to detect whether an input voltage of the input terminal is larger than a predefined value, wherein the predefined value is set larger than a voltage outputted from the battery unit; a voltage adjustment unit coupled to the input terminal; a control unit coupled to the voltage detection unit and the voltage adjustment unit, wherein the control unit controls the voltage adjustment unit to adjust the input voltage to a first operating voltage as an output voltage if the input voltage is larger than the predefined value, the control unit controls the voltage adjustment unit to adjust the input voltage to a second operating voltage as an output voltage if the input voltage is smaller than the predefined value, and the first operating voltage is larger than the second operating voltage; and a driving unit coupled to the voltage adjustment unit, and driving the nebulization module to nebulize the liquid according to the output voltage of the voltage adjustment unit. a power adapter; and a nebulizer adapted to be detachably connected to the power adapter, comprising: a nebulization module having an accommodation room for placing a liquid; and a nebulization driving device connecting to the nebulization module and comprising: a battery unit; an input terminal coupled to the power adapter and the battery unit; characterized by a voltage detection unit coupled to the input terminal to detect whether an input voltage of the input terminal is larger than a predefined value, wherein the predefined value is set larger than a voltage outputted from the battery unit; a voltage adjustment unit coupled to the input terminal; a control unit coupled to the voltage detection unit and the voltage adjustment unit, wherein the control unit controls the voltage adjustment unit to adjust the input voltage to a first operating voltage as an output voltage if the input voltage is larger than the predefined value, the control unit controls the voltage adjustment unit to adjust the input voltage to a second operating voltage as an output voltage if the input voltage is smaller than the predefined value, and the first operating voltage is larger than the second operating voltage; and a driving unit coupled to the voltage adjustment unit, and driving the nebulization module to nebulize the liquid according to the output voltage of the voltage adjustment unit. a nebulization module having an accommodation room for placing a liquid; and a nebulization driving device connecting to the nebulization module and comprising: a battery unit; an input terminal coupled to the power adapter and the battery unit; characterized by a voltage detection unit coupled to the input terminal to detect whether an input voltage of the input terminal is larger than a predefined value, wherein the predefined value is set larger than a voltage outputted from the battery unit; a voltage adjustment unit coupled to the input terminal; a control unit coupled to the voltage detection unit and the voltage adjustment unit, wherein the control unit controls the voltage adjustment unit to adjust the input voltage to a first operating voltage as an output voltage if the input voltage is larger than the predefined value, the control unit controls the voltage adjustment unit to adjust the input voltage to a second operating voltage as an output voltage if the input voltage is smaller than the predefined value, and the first operating voltage is larger than the second operating voltage; and a driving unit coupled to the voltage adjustment unit, and driving the nebulization module to nebulize the liquid according to the output voltage of the voltage adjustment unit. a battery unit; an input terminal coupled to the power adapter and the battery unit; characterized by a voltage detection unit coupled to the input terminal to detect whether an input voltage of the input terminal is larger than a predefined value, wherein the predefined value is set larger than a voltage outputted from the battery unit; a voltage adjustment unit coupled to the input terminal; a control unit coupled to the voltage detection unit and the voltage adjustment unit, wherein the control unit controls the voltage adjustment unit to adjust the input voltage to a first operating voltage as an output voltage if the input voltage is larger than the predefined value, the control unit controls the voltage adjustment unit to adjust the input voltage to a second operating voltage as an output voltage if the input voltage is smaller than the predefined value, and the first operating voltage is larger than the second operating voltage; and a driving unit coupled to the voltage adjustment unit, and driving the nebulization module to nebulize the liquid according to the output voltage of the voltage adjustment unit.