The invention discloses an intelligent fire extinguisher with spraying quantity adjustable. The intelligent fire extinguisher comprises a fire extinguisher body, a base is arranged at the lower end ofthe fire extinguisher body, the fire extinguisher body is movably connected with a groove of the base in a clamping mode, an armrest is arranged at the left end of the upper surface of a supporting seat of the base, and a containing groove is formed in the base; and a storage battery is contained in the containing groove, two positioning devices are arranged on the side surface of the armrest, positioning rings of the positioning devices are movably connected to the outer side of a tank body of the fire extinguisher body in a sleeving mode, a driving device is arranged in the tank body of thefire extinguisher body, and a separating device is arranged on the side surface of a screw of the driving device. According to the intelligent fire extinguisher with the spraying quantity adjustable,fire extinguisher bodies of different heights can be stored, limited and positioned, the stability is good, the intelligent fire extinguisher can be moved, and labor is saved; and a fire extinguishing agent can further be quantitatively separated and sprayed, waste of the fire extinguishing agent can be reduced, meanwhile, the environment can be protected, the operation is easy, and the use is convenient.