A wall-pluggable aroma machine that uses a replaceable aroma container is provided. The aroma machine includes an electric plug pluggable to a power source, a housing, a top cap, and a light-guiding accommodation unit coupled between the housing and the top cap. The light-guiding accommodation unit serves as a basic limiting component for the production of the aroma machine, for the components to be assembled quickly and correctly. The replaceable aroma container is placed in light-guiding accommodation unit, and is heated to release fragrance. The aroma container is disposable, or recycled. It is easy to use and replace the aroma. The light-guiding accommodation unit is made of a transparent material. Light emitted by a light emitting device in the aroma machine is guided to the light-guiding accommodation unit, and forms light decoration on an outside of the aroma machine.
