Sterilization device and sterilization method using same

A sterilization device, comprising:

• a chamber including a sterilization space in which a sterilization target is contained, a fluid channel spaced apart inwardly from a wall surface by a predetermined distance and receiving a fluid from the outside, and a barrier separating the sterilization space, the barrier including multiple through-holes such that the fluid flows between the fluid channel and the sterilization space through the through-holes;
• a sterilization module communicating with the fluid channel so as to supply a sterilization gas to the fluid channel;
• and
• a catalyst module communicating with the fluid channel so as to circulate air inside the chamber,
• wherein the fluid channel is configured such that the sterilization gas channel communicating with the sterilization module, and an internal circulation channel communicating with the catalyst module are separated from each other.