A direct water chiller having a high temperature sterilization function is disclosed. According to an embodiment of the present invention, there is provided a cold / hot water system in which cold water and hot water are combined with a water tank, comprising: a water receiving member to which an inlet of a water tank is coupled A water supply pipe connected to a water outlet formed at a lower portion of the water receiving member A drain valve formed at an end of the water supply pipe and being turned on and off A first tee connected to the water supply pipe and formed at a front side of the drain valve and branched, a cold water reservoir branched from the first tee to cool the mineral water A cooling module for cooling the cold water reservoir A cold water outlet valve connected to the water outlet of the cold water reservoir a cold water outlet valve mounted on the cold water outlet to control the on / off of the cold water outlet A hot water tank connected to the hot water hose to store and heat the hot water a hot water tank connected to the hot water tank for heating and storing the hot water A heating module for heating the hot water tank A hot water outlet valve connected to the hot water tank for controlling on / off of hot water outflow A branch pipe connected to branch from the check valve and connected to the water supply pipe, a high temperature sterilization valve formed in the branch pipe and opening and closing the opening and closing And a controller having a switch for selectively controlling hot water outflow, cold water outflow, and high temperature sterilization.고온멸균 기능이 있는 직수냉온수기가 개시된다. 본 발명의 일 실시예는 생수통이 결합되며 냉수,온수가 제공되는 냉온수기에 있어서, 생수통의 입구가 결합되는 물 수용부재 상기 물 수용부재의 하부에 형성된 출수공에 연결되는 급수관 상기 급수관의 단부에 형성되며 온오프되는 드레인밸브 상기 급수관에 연결되며 상기 드레인밸브의 앞쪽에 형성되어 분기시키는 제1티이와, 상기 제1티이로부터 분기되어 생수를 냉각시키는 냉수저장통 상기 냉수저장통을 냉각시키는 냉각모듈 상기 냉수저장통의 출수부에 연결되는 냉수출수관과, 상기 냉수출수관에 장착되어 냉수 출수의 온오프를 제어하는 냉수출수밸브 상기 제1티이와 드레인밸브 사이에 형성되어 생수를 분기시키는 제2티이와, 상기 제2티이에 연결되는 온수호스와, 상기 온수호스
