This utility model discloses a constant temperature heating coaster, including a coaster body; the coaster body consists of an outer shell and a holding plate, with a protective shell installed at the bottom of the holding plate, the bottom end of the protective shell extending into the outer shell, a weighing sensor installed between the bottom end of the protective shell and the interior of the outer shell, a controller installed at the front end of the outer shell, and a voice recognition module installed on the other side of the front end of the outer shell. A
heating element is installed inside the bottom end of the holding plate, and a temperature sensor is installed inside the protective shell. The temperature sensor,
heating element, weighing sensor, and voice recognition module are connected to the controller via wires. This utility model uses voice control to start, stop, and adjust the
heating temperature. Simultaneously, the weighing sensor stores the weight of the cup, and by comparing the weight with the
water level in the cup, the controller automatically determines whether to continue heating based on the
water level, avoiding heating an empty cup and preventing heating from continuing when there is no cup on the holding plate.