To provide a reuse system of fire-extinguisher for water-based fire extinguishing equipment allowing the continuous release of a fire-extinguisher without shortage of fire-extinguisher to provide high fire extinguishing performance (suppressing effect), and also the reduction in storage fire-extinguisher amount by the circulation of the fire-extinguisher to reduce the fire-extinguisher storage space.

In this system, the fire-extinguisher amount determined in the Fire Defense Law is stored, and the fire-extinguisher is successively recovered after its release and returned to the storage side. Accordingly, the continuous release of fire-extinguisher exceeding the storage fire-extinguisher amount can be performed by such a circulation of fire-extinguisher.