Only a bottle properly preliminarily heated is sterilized by hydrogen peroxide. Temperature inspection to the bottle is performed while travelling the bottle. During the inspection, a bottle of which temperature does not reach a predetermined temperature is removed and a bottle of which temperature reaches the predetermined temperature is continuously traveled, hydrogen peroxide condensed mist α is blown toward a mouth portion 1a of the bottle by a spray tube 59 disposed at a predetermined position, and hot air is blown into the bottle from the nozzle while the nozzle 64 following the mouth portion of the bottle. According to such operation, only the bottle properly heated can be sterilized by the hydrogen peroxide, Thereafter, beverage fills the bottle, which is then sealed.