Water steam is sprayed to preforms 1 while continuously transferring the preforms 1, the preforms are preliminarily sterilized by heat application, bottles are produced by blow-molding the thus preliminarily sterilized performs in a molding die 4 which is continuously transferred with the preforms, the bottles are taken out from the continuously transferring molding die, condensed mist M or gas G of hydrogen peroxide is sprayed to the bottle in a time when the heat remains, an air rinsing process is performed, beverage fills the bottles during the continuous transferring, and the bottles are sealed with caps. The bottle sterilization processes can be simplified in an inline system.
