A sweet atmosphere humidifier comprises a base, a control module, an air-guiding cap, a water box and a decorative cover. The air-guiding cap is provided with a chamber and a first conductive terminal exposed inside the chamber. The water box is provided with a liquid storage tank, an atomizing unit inside the liquid storage tank, and a second conductive terminal on the external surface of the water box. The base, the control module, the air-guiding cap and the water box are mounted inside the decorative cover. In the sweet atmosphere humidifier, the atomizing unit is possibly provided in the water box to be replaced conveniently by fitting the first conductive terminal to the second conductive terminal. Moreover, the appearance profile of the decorative cover may be further fitted to the shape of base, control module, air-guiding cap and water box, so as to obtain more interesting appearance.
