PURPOSE: To offer the sprinkler equipment system being effective even against an oil fire by securing reliability being equal to that of a conventional pre- operation type by a simple device utilizing feed water pressure of city water, and also, decreasing the quantity of a discharge liquid by using a medical fluid and reducing a water loss.

CONSTITUTION: The system is provided with a fire detecting means 12, a sprinkler head 11 of a closed type in which the head is opened by melting of a fuse by heat and which becomes a state that water can be discharged, an opening detecting means 3 for detecting the opening of the sprinkler head 11, a solenoid valve 5 for controlling a feed liquid to the sprinkler head 11 from a feed liquid source of a fire extinguishing liquid, and a control means 1 for controlling the solenoid valve to open by a fact that a fire is detected by the fire detecting means 12 and opening is detected by the opening detecting means. Also, this system is provided with a medical fluid tank 6 for feeding a medical fluid by pressurizing it by feed water pressure of city water as a feed liquid source of a fire extinguishing liquid, or an air tank 4 for filling a piping system between the solenoid valve 5 and the sprinkler head 11, with air by pressurizing it by feed water pressure of city water.