The basic principle of fire prevention is a necessary condition to limit combustion.

The basic principle of fire prevention is to limit the formation of sufficient and necessary conditions for combustion, that is, as long as the formation of combustion conditions or the coexistence and mutual combination of combustion conditions are prevented, the purpose of fire prevention can be achieved.

The basic principle of fire extinguishing is to destroy the existing combustion conditions, that is, to eliminate combustion-supporting substances, reduce the temperature of combustion products, interrupt the combustion chain reaction, prevent the fire from spreading and spreading, and not form new combustion conditions, so as to achieve the purpose of fire extinguishing and minimize the harm of fire.

There are four basic fire extinguishing methods: cooling fire extinguishing method, suffocation fire extinguishing method, isolation fire extinguishing method and chemical suppression fire extinguishing method. When a fire breaks out, what fire extinguishing methods and measures should be chosen according to the nature of the fire, the combustion characteristics, the performance of fire-fighting equipment and the specific situation of the fire site.