A well-equipped large theater must be equipped with automatic and manual fire control and fire isolation curtains. In the event of a fire alarm, the fire protection system will activate to extinguish the fire.

As the theater is a public place, especially during performances, the stage and auditorium are relatively crowded with performers and audience members. During the overall implementation on the stage, high-power lights and lighting electrical equipment are used frequently, while items such as curtains, wooden supports, and floors are flammable. In the event of an open flame, a large amount of smoke and heat will inevitably spread to the auditorium, causing greater casualties and equipment damage. The fire curtain is manually lowered by staff at this critical moment to isolate the stage from the auditorium, preventing the fire from spreading to the auditorium. This allows for an orderly evacuation of the audience in the auditorium, preventing the fire from spreading and reducing the losses caused by the fire.