Fire-fighting linkage control means that after the fire detector detects the fire signal, it can automatically cut off the relevant air conditioner in the alarm area, close the fire damper on the pipe, stop the relevant fan change, open the smoke valve of the relevant pipe, and automatically close the relevant part Electric fire doors, fire shutter doors, cut off non-fire power supplies in order, turn on emergency lighting and evacuation lights, stop all elevators except fire elevators, and use the controller of the control center to immediately start the fire extinguishing system for automatic Extinguishing.

The combination of linkage can generally be divided into two forms: centralized control, decentralized control, and centralized control. The control methods include linkage (automatic) control, non-linked (manual) control, and a combination of linkage and non-linked control.

The centralized control system is a system that centrally controls, displays, and manages all the fire-fighting facilities in the system through the fire-fighting control room. This kind of system is suitable for bus system, implementation of digital control, and communication system, especially suitable for building automation management system that adopts computer control; multi-wire system is also commonly used when the number of control points is small and scattered. When the number of control points is particularly large and dispersed, in order to make the control system simple and reduce the number of display of control signals and the number of control lines, a system that combines decentralization and centralization can be used, usually a fire-fighting water pump, a blower, an anti-exhaust fan, Some fire shutter doors and automatic fire extinguishing control devices, etc., are centrally controlled and managed in the fire control room; for large and dispersed control systems such as smoke exhaust fans, fire door releases, etc., on-site decentralized control can be adopted. It should be emphasized that no matter what kind of control system, the action signal of the controlled object's actuator should be sent to the fire control room for centralized display. Controlled objects (such as elevators, non-fire power supplies, etc.) that are likely to cause chaos and serious consequences in high-rise buildings should be centrally managed by the fire control room.