The present invention relates to an adjuster for adjusting drink temperature, including a base, a container arranged on the base, a stay bar seating fixed on the base and extending into the container from the base of the container and secured to the container, a stay bar device arranged in the stay bar seating and formed as a muff coupling with the stay bar seating without liquid leakage, one end of thereof extending out of the stay bar seating and the other end forming the driving end, and an actuating device cooperating with the driving end of the stay bar device to drive the stay bar device.