Water purifier with a cold water suppying module and operating method of the same

The present invention relates to a water purifier and a method of operation having a cold module, according to an aspect of the invention, which cooling water is stored in the cold water tank; Is disposed inside the cold water tank cooling module comprises an evaporator for heat exchange with the cooling water; A cold water pipe to the water that exchanges heat with the cooling water passing inside the cold water tank; An agitator for agitating the cooling water; A first temperature measuring means for measuring the temperature of the ice generated in the evaporator surface, A second temperature measuring means for measuring the temperature of the cooling water which is located in the cold water tank; And a control section for, based on one of the first the second temperature and the outside temperature measured by the second temperature measuring means to change the operating period of the agitator; a water purifier provided with a cooling module comprising: a is provided.