Fire linkage test refers to the linkage of all existing fire protection facilities in the same fire zone and related fire zones. Fire fighting linkage generally refers to the control of related fire zones, that is, fire-fighting pressurized fans, pressurized tuyeres and fire-fighting air supply fans in the test area and adjacent fire zones. Fire smoke exhaust port and smoke exhaust fan. Fire doors and fire shutter doors. Electric smoke exhaust window, fire emergency lighting and evacuation indication signs are forced to start and non-fire electricity is forced to cut off, fire broadcasting and acousto-optic alarm are started and played circularly, and the pre-action system is linked to start water filling.