The present invention relates to a method for manufacturing drinking water by using deep sea water. More specifically, the present invention relates to a method for manufacturing hygienically safe drinking water by using desalinated water obtained by desalinating deep sea water in a deep sea layer deeper than 200 m in depth below the surface of the sea. According to the present invention, in regards to the manufacture of drinking water using deep sea water, a method for manufacturing drinking water from deep sea water comprises: a deep sea water pretreatment step of taking deep sea water, heating the deep sea water at 20-30°；C, and performing a mixed filtration process of at least one process among sand filtration, microfiltration, ultrafltration and nanofiltration； a desalination step of desalinating the deep sea water which has been pretreated via a desalination process by an electroextraction process to produce desalinated water； a boron compound removal step of treating the desalinated water with an alkaline agent to adjust the pH of the desalinated water in the range of 9-11 and sending the desalinated water to a reverse osmosis filtration process to produce filtered water in which a boron compound has been removed； and a hardness adjustment step of supplying a mineral adjuster to the filtered water in which the boron compound has been removed to adjust the hardness of the filtered water in the range of 30-500 mg/L, thereby manufacturing the filtered water into drinking water.본 발명은 본 발명은 해양 심층수를 이용하여 음료수를 제조하는 방법에 관한 것으로, 더욱 상세하게는 해수면에서 수심 200m보다 깊은 해저심층의 해양 심층수를 탈염처리한 탈염수를 이용하여 음료수를 제조하는 방법에 관한 것이다.이를 위하여 본 발명은 해양 심층수를 이용하여 음료수의 제조에 있어서, 해양 심층수를 취수하여 20∼30℃로 가온 처리한 다음, 모래여과, 정밀여과, 한외여과 또는 나노여과를 한가지 이상의 공정을 조합한 여과를 하여 해양 심층수의 전처리단계와, 상기 처리된 해양 심층수는 전기추출공정에 의한 탈염처리공정에 의해서 탈염처리하여 탈염수를 생산하는 탈염단계와, 상기 탈염수를 알칼리제로 처리하여 pH를 9∼11 범위로 조정한 다음, 역삼투여과공정으로 보내어 붕소화합물이 제거된 여과수를 생산하는 붕소화합물제거단계와, 상기 붕소화합물을 제거한 여과수에 미네랄조정제를 공급하여 경도를 30∼500㎎/ℓ범위로 조정하여 음료수를 제조하는 단계로 이루어진 것을 특
