A nebulization system comprises a power adapter and a nebulizer. The nebulizer comprises a nebulization module for placing a liquid and a nebulization driving device. The nebulization driving device comprises a battery unit, an input terminal, a voltage detection unit, a voltage adjustment unit, a control unit and a driving unit. The input terminal is coupled to the power adapter and the battery unit. The voltage detection unit detects whether an input voltage of the input terminal is larger than a predefined value. The control unit controls the voltage adjustment unit to adjust the input voltage to a first/second operating voltage as an output voltage respectively if the input voltage is larger/smaller than the predefined value. The first operating voltage is larger than the second operating voltage. The driving unit drives the nebulization module to nebulize the liquid according to the output voltage of the voltage adjustment unit.
