The invention discloses a control method and device for a humidifier and the humidifier. The method comprises the following steps: acquiring initial humidification current when the humidifier starts to humidify; determining an initial water level of a humidification bucket in the humidifier according to the initial humidification current; and carrying out humidification control on the humidifier according to the initial water level. According to the control method and device for the humidifier and the humidifier, disclosed by the invention, the defects in the prior art that the real-time performance is poor, the reliability is low, the user experience is poor and the like can be overcome and the beneficial effects of good real-time performance, high reliability and good user experience are realized.