Drones are used in almost all the operations as well as the industries nowadays because of their reliability, cost effectiveness and multi-functionality. Jet pack is a type of device like drone but that are propelled by jets of escaping gases/fluids to propel into the air or to fly. Water jet that used to cut the metals, have been used a high-density propulsion fluid. The hydro jet packs have been successfully designed and developed and used in various applications. Water Jet Fire Extinguisher is an invention, which uses the water jet as a propeller as well to extinguish the fire. The hose is connected to the body and the other end is connected to fire hydrant (water supply line). The sprinkler is provided on the top which can spray water to some radius and also it can made to rotate and shoot jet of water and it has telescopic arm which can stretch. This paper describes the design and testing of the Water Jet Fire Extinguisher system or Fire Fighting Drone. The main application of this device is in forest fire and in the skyscrapers.