A data center system, wherein the system comprises: a housing to house a plurality of servers operating therein, the servers being arranged in a plurality of electronic racks (101, 102, 103); an air supply system to receive contaminated air from an external environment of the housing, the contaminated air containing a plurality of particles; a misting and cooling system coupled to the air supply system to receive the contaminated air and to clean and cool the contaminated air, wherein the misting and cooling system includes a cooling and cleaning chamber to receive the contaminated air from the air supply system, and a plurality of nozzles arranged to spray a plurality of liquid droplets into the contaminated air within the cooling and cleaning chamber, wherein the liquid droplets directly contact the particles of the contaminated air to collect and remove at least a portion of the particles contained in the contaminated air to generate non-contaminated air, the plurality of nozzles are disposed on a ceiling of the cooling and cleaning chamber to spray mists of liquid drops vertically into the contaminated air; and an airflow delivery system coupled to the misting and cooling system to generate an airflow from the non-contaminated air, to cause the airflow to travel through the servers of the electronic racks (101, 102, 103) to exchange heat generated by the servers due to operations of the servers, and to exhaust the airflow carrying the exchanged heat to the external environment outside of the housing; characterized in that the misting and cooling system further comprises: one or more sensors (241, 242) disposed at a plurality of locations, including a first sensor to measure particles of the contaminated air; and a controller coupled to the sensors (241, 242) to adjust settings of at least the nozzles of the misting and cooling system based on data received from at least the first sensor to generate the liquid droplets in a size that is optimal to collect and remove the particles from the contaminated air. a housing to house a plurality of servers operating therein, the servers being arranged in a plurality of electronic racks (101, 102, 103); an air supply system to receive contaminated air from an external environment of the housing, the contaminated air containing a plurality of particles; a misting and cooling system coupled to the air supply system to receive the contaminated air and to clean and cool the contaminated air, wherein the misting and cooling system includes a cooling and cleaning chamber to receive the contaminated air from the air supply system, and a plurality of nozzles arranged to spray a plurality of liquid droplets into the contaminated air within the cooling and cleaning chamber, wherein the liquid droplets directly contact the particles of the contaminated air to collect and remove at least a portion of the particles contained in the contaminated air to generate non-contaminated air, the plurality of nozzles are disposed on a ceiling of the cooling and cleaning chamber to spray mists of liquid drops vertically into the contaminated air; and a cooling and cleaning chamber to receive the contaminated air from the air supply system, and a plurality of nozzles arranged to spray a plurality of liquid droplets into the contaminated air within the cooling and cleaning chamber, wherein the liquid droplets directly contact the particles of the contaminated air to collect and remove at least a portion of the particles contained in the contaminated air to generate non-contaminated air, the plurality of nozzles are disposed on a ceiling of the cooling and cleaning chamber to spray mists of liquid drops vertically into the contaminated air; and an airflow delivery system coupled to the misting and cooling system to generate an airflow from the non-contaminated air, to cause the airflow to travel through the servers of the electronic racks (101, 102, 103) to exchange heat generated by the servers due to operations of the servers, and to exhaust the airflow carrying the exchanged heat to the external environment outside of the housing; characterized in that the misting and cooling system further comprises: one or more sensors (241, 242) disposed at a plurality of locations, including a first sensor to measure particles of the contaminated air; and a controller coupled to the sensors (241, 242) to adjust settings of at least the nozzles of the misting and cooling system based on data received from at least the first sensor to generate the liquid droplets in a size that is optimal to collect and remove the particles from the contaminated air. one or more sensors (241, 242) disposed at a plurality of locations, including a first sensor to measure particles of the contaminated air; and a controller coupled to the sensors (241, 242) to adjust settings of at least the nozzles of the misting and cooling system based on data received from at least the first sensor to generate the liquid droplets in a size that is optimal to collect and remove the particles from the contaminated air.