300 to engage the heater 300 with the receiving case 15 the front board 36 covers the receiving case 15 in this position the heater 300 is located in a closed position as shown in fig7 in use the controller 20 controls the display 21 to display a message inviting a user to request hot water when the automatic pill dispenser starts to pick pills if the user chooses yes the controller 20 controls the display 21 to display a message to prompt the user to pull out the heater 300 and put the cup 500 on the heater 300 then the box 30 is slid out of the receiving case 15 through the operation portion 361 the resilient member 37 rebounds to release the limiting block 313 to abut a surface supporting the automatic pill dispenser and the heater 300 is in an opened position a moving direction of the limiting block 313 is substantially perpendicular to a sliding direction of the box 30 the cup 500 is placed in the limiting space 65 the limiting block 313 abuts the supporting surface to prevent the heater 300 and the cup 500 from hanging in the air and dropping the electronic heating plate 50 heats water in the cup 500 through the conducting strip 60 the temperature sensor 70 senses the temperature of the electronic heating plate 50 and sends temperature information to the controller 20.