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.