Ventilation and tail end jet flow type temperature and humidity control system and control method for underground building

The invention provides a ventilation and tail end jet flow type temperature and humidity control system and control method for an underground building. The control system comprises a ventilating centralized dehumidification device, a tail end jet flow dehumidification device, an air exhaust device and a system controller, wherein the ventilating centralized dehumidification device is used for centralized processing of ventilating heat and humidity loads, and the tail end jet flow dehumidification device is used for processing of indoor heat and humidity loads; the air exhaust device is used for carrying out air exhaust tasks of underground rooms; and the system controller is connected with the ventilating centralized dehumidification device, the tail end jet flow dehumidification device and the air exhaust device, manages the united operation of all the devices in a unified mode, and effectively controls the air temperature and humidity in all the underground rooms. According to the control system, aiming at