This is the first horizontal cabinet-type room air conditioner in the world. It optimizes the space, and the appearance of it is simple, pure and fashionable. The application of the concept of things being connected via Internet realizes the mutual connection between things (e.g. create the extremely true scene together with the audio and video). It realizes the functions of exchange of fresh air under constant temperature, optimization of air quality and adjustment of suitable temperature. At the same time, it perfectly integrates with the household environment and saves the space.