Our design is to weaken building function, improving emissions, and freely define public space. A large area of moss wall is used to absorb emissions. The main component of emissions are NO3-, and NH4+ , and also the components to cause acid rain. So, we use the nitrogen-fixing ability of the moss to decompose these components that causing air pollution. After PM2.5 attachment, system could decompose the required substances for moss. Urban Breathing System in which structures and bus stop are blended together, freely assembled. This organic system increases potentials of adaptation in urban.