The present invention prevents the movement of various viruses, bacteria, etc., into the unwanted space, and considers the safety of the people and the safety of medical workers, and manufactures a multi-functional pneumatic machine having a sound pressure function and a positive pressure function that includes four functions. Provides a multifunctional pneumatic machine with method, sound pressure function and positive pressure function Basically an intake unit having a primary function； Filter the contaminated air in the enclosed space through the filter and discharge it to the outside after intake to reduce the air pressure inside, and to filter the air through the filter and discharge the inhaled air to ventilate and prevent backflow Having an intake Secondary function supply unit； It has a positive pressure function to increase the air pressure by filtering the outside air through the filter and supplying the intake air to the inside of the closed space, and a ventilation function and a backflow prevention function to ventilate the air in the closed space by filtering the air through the filter to supply it to the inside. Having a supply part, A disinfecting unit having a tertiary function； Disinfecting unit that disinfects and discharges the filtered air through the filter again, A control unit having a fourth function； In order to generate and maintain sound pressure and positive pressure in the space, the proper oil pressure and the maximum oil pressure are set and automatically adjusted.In order to ventilate the air in the space where the negative pressure and positive pressure are maintained, set the ventilation cycle and ventilation operation time per internal time. Providing a manufacturing method of a multi-function pneumatic air compressor having a sound pressure function and a positive pressure function, including a control unit for automatic control, and a multi-function air compressor having a sound pressure function and a positive pressure function
