Abstract: A data center local cooling system with a pre-cooling chiller includes a pre-cooling chiller that is installed outside a data center; a plurality of refrigerant distributors that are connected to the pre-cooling chiller through a cooling water flow line through which the cooling water flows and a third refrigerant flow line through which a third refrigerant flows; a plurality of in-row air conditioners that are disposed between server racks in an interior of the data center, are connected to the refrigerant distributors through the third refrigerant flow line through which the third refrigerant flows; and a control unit that is electrically connected to the pre-cooling chiller, the plurality of refrigerant distributors, and the plurality of in-row air conditioners, and controls operations of the pre-cooling chiller, the plurality of refrigerant distributors, and the plurality of in-row air conditioners based on an temperature of external air.