The invention relates to a humidifier control method and device. The humidifier control method comprises the following steps of: acquiring the environment temperature; judging whether the environment temperature is smaller than a predetermined threshold value or not; when the environment temperature is smaller than a predetermined threshold value, acquiring the temperature of a water pond of a humidifier; and controlling the working power of an evaporating device according to the environment temperature and the temperature of the water pond of the humidifier. The method solves the problem that an existing humidifier control mode is low in stability.