Abstract: A unified fire extinguishing system for a turbine bearing in a power plant, the system puts out a fire that breaks out due to overheating of a lubricant oil due to friction between a turbine shaft disposed inside a turbine bearing housing in the power plant and a turbine bearing that rotatably supports the turbine shaft, and the system includes: a spray nozzle separate from the turbine bearing and disposed inside the turbine bearing housing; and a connection pipe having one end connected to the spray nozzle and the other end connected to a sprinkler pipe, wherein, when a fire breaks out in the turbine bearing housing due to overheating of the lubricant oil, a fire extinguishing fluid supplied from the sprinkler pipe for putting out a fire passes through the connection pipe and is discharged into the turbine bearing via the spray nozzle.