The present invention relates to a constant temperature and humidity device for mushroom cultivation installed in an indoor space of a mushroom cultivation room, and more particularly, to an inflow pipe connected to the outside of a mushroom cultivation room, one end of which is connected to a wall forming the mushroom cultivation room. An inlet chamber connected to the other end of the inflow pipe for receiving outdoor air outside the mushroom cultivation room and sucking the inside air of the indoor space to generate mixed air； An evaporator for reducing the temperature of the mixed air discharged from the inlet chamber； A blower for allowing the outside air outside the mushroom cultivation room and the inside air of the indoor space to flow into the inflow chamber and generating a suction force to transfer the mixed air to the evaporator； An outflow chamber provided with mixed air discharged from the blower； An outflow pipe connected to the outflow chamber at one end and connected to a wall of the mushroom cultivation chamber at the other end to discharge mixed air to the outside； A discharge duct having one end connected to the outflow chamber and the other end installed in the indoor space to discharge the mixed air into the indoor space； A carbon dioxide sensor which is electrically connected to the evaporator and the blower and measures the amount of carbon dioxide in the space, and the amount of mixed air discharged to the outflow pipe and the amount of mixed air discharged to the discharge duct are determined according to the amount of carbon dioxide in the space. The amount of carbon dioxide is reduced to maintain the best air condition for growing the mushroom.본 고안은 버섯재배실의 실내공간에 설치되는 버섯재배용 항온항습기에 관한 것으로서, 특히 상기 버섯재배실을 형성시키는 벽체에 일단이 연결되어 버섯재배실 외부와 연통되는 유입배관과； 상기 유입배관의 타단에 연결되어 버섯재배실 외부의 실외공기를 공급받음과 아울러 상기 실내공간의 내부공기를 흡입하여 혼합공기를 생성하는 유입챔버와； 상기 유입챔버로부터 토출되는 혼합공기의 온도를 떨어뜨리는 증발기와； 상기 유입챔버 내부로 버섯재배실 외부의 실외공기와 실내공간의 내부공기가 유입되도록 함과 아울러 상기 혼합공기가 증발기 쪽으로 이송되도록 흡입력을
