A smart energy-saving device for automatic blending drinks, adopted to inject beverages into at least one beverage cup that comprises a bar code, comprises: beverage barrels; manifolds; at least one ice-storing device including at least one ice outlet, at least one servomotor, a stirring rod, and at least one thruster; beverage stations; collection mechanisms including ring structures, ice inlets, water inlets, and beverage tubes; and a control module including flowmeters, water valve switches, beverage-cup-weight sensors, beverage-barrel-weight sensors, at least one ice-beverage-barrel-weight sensor, pressure sensors, bar code readers, infrared scanners; and a controller.