An improved steamer (second application) has properties of small volume, no need of change water, fast speed of steam generation, save power, and essence therapy. The steamer includes a main body, a filter, a steam supply unit, and a control unit. Water input tube enters a steam generator of the main body through the filter. The steam generator is installed with an electric heater at the lower part. The heater is enclosed by mineral wool and has a temperature sensor and a water level detector. By controlling the water level in the steam generator and function of power safety cut, the generated steam is straddled out through the steam supply unit. Inside of the steam supply unit, it has two separated gas holes and a containing space. The essence is filled into the containing space, and can be evaporated together with the steam to be supplied from the gas holes.