A beer production device comprising: an inner chamber having a space formed therein; an insulation member surrounding the inner chamber ; a door configured to open and close the space ; a beer production container received in the space ; a water supply module configured to supply water into the beer production container ; and a temperature controller configured to control a temperature of the space , wherein the beer production container includes: a container having a hollow portion formed on an upper portion thereof and having formed therein an inner space , in which main beer ingredients are received; and a cap assembly configured to open and close the hollow portion , and having received therein an additive bag , in which additives are received, wherein a through-hole , through which water, beer and additives pass, is formed in the container , characterized in that : a perforation portion configured to perforate the additive bag is formed in the container , and the cap assembly is locked to the container in multiple locking stages including: a first-stage locking position in which the additive bag is not perforated by the perforation portion and a second-stage locking position in which the additive bag is perforated by the perforation portion . an inner chamber having a space formed therein; an insulation member surrounding the inner chamber ; a door configured to open and close the space ; a beer production container received in the space ; a water supply module configured to supply water into the beer production container ; and a temperature controller configured to control a temperature of the space , wherein the beer production container includes: a container having a hollow portion formed on an upper portion thereof and having formed therein an inner space , in which main beer ingredients are received; and a cap assembly configured to open and close the hollow portion , and having received therein an additive bag , in which additives are received, wherein a through-hole , through which water, beer and additives pass, is formed in the container , characterized in that : a perforation portion configured to perforate the additive bag is formed in the container , and the cap assembly is locked to the container in multiple locking stages including: a first-stage locking position in which the additive bag is not perforated by the perforation portion and a second-stage locking position in which the additive bag is perforated by the perforation portion . a container having a hollow portion formed on an upper portion thereof and having formed therein an inner space , in which main beer ingredients are received; and a cap assembly configured to open and close the hollow portion , and having received therein an additive bag , in which additives are received, wherein a through-hole , through which water, beer and additives pass, is formed in the container , characterized in that : a perforation portion configured to perforate the additive bag is formed in the container , and the cap assembly is locked to the container in multiple locking stages including: a first-stage locking position in which the additive bag is not perforated by the perforation portion and a second-stage locking position in which the additive bag is perforated by the perforation portion . a perforation portion configured to perforate the additive bag is formed in the container , and the cap assembly is locked to the container in multiple locking stages including: a first-stage locking position in which the additive bag is not perforated by the perforation portion and a second-stage locking position in which the additive bag is perforated by the perforation portion . a first-stage locking position in which the additive bag is not perforated by the perforation portion and a second-stage locking position in which the additive bag is perforated by the perforation portion . <EOS>