Abstract: A machine for drinking water adapted to instantly heat/cool the water for drinking, it includes: a main body provided with an operation panel and a water providing outlet, a water storage barrel, a pump for drawing the water, and a heating unit and/or a cooling unit, a user can thus operates the operation panel to render the water for drinking to be instantly heated or cooled and to flow out of the water providing outlet for being drunk instantly, the machine for drinking water of the present invention does not need to be provided with a heat preservation tank or a coolness preservation tank, but the user can get hot water or ice water instantly, this can largely reduce exhausted electric quantity and occupied space.