Abstract: A pocket-type ultrasonic atomizer structure comprised of a water reservoir, an atomization chamber and an atomizing unit of a main unit, and a water supply regulating mechanism, wherein the opening and closing of the water supply regulating mechanism and the water reservoir is integrated such that closing the water reservoir enables the simultaneous entry of a volume of water required in the atomization chamber through atmospheric pressure and the maintenance of a preset liquid surface height to thereby achieve low-voltage atomizing performance.