An automatic device for brewing beverages at least comprises an ice cube meter, at least one beverage supply device, at least one robotic arm, a feed conveyor belt, a plurality of feeders, and a film sealing machine, mainly uses the robotic arm to take up ice cubes and a beverage from the ice cube meter and the beverage supply device with a hand-shake cup, then shake and mix, and pour the shaken and mixed beverage and ice cubes into a beverage cup, the beverage cup is conveyed to pass through the feeders by the feed conveyor belt, ingredient is squeezed into the beverage cup by the feeder, and finally the beverage cup containing the beverage, ice cubes and ingredient is conveyed by the feed conveyor belt to the film sealing machine for sealing.