Fresh air conditioning system and temperature and humidity control method

The invention provides a fresh air conditioning system and a temperature and humidity control method.The fresh air conditioning system comprises a refrigeration station and an air conditioner which communicate with each other, the air conditioner is provided with an air outlet and an air inlet, the air outlet is used for being arranged towards the interior of a room, and the air inlet is used for being communicated with the exterior of the room; the plurality of control valves are arranged in parallel, and the refrigeration station, the plurality of control valves and the air conditioner are connected in sequence to form a refrigerant circulation loop; the first detection part is arranged at the air inlet and used for detecting the temperature and humidity of the inlet air, and the first detection part is connected with the multiple control valves; and the second detection part is arranged at the air outlet and used for detecting the air outlet temperature and humidity of the air conditioner, and the second d