The latest combined power plants are increasing recently and electrical power system is required for the stability of electricity supply and demand caused by the shortage of electricity. At such time, the stability of the gas turbine facility is very important. A study on the facility system for gas turbine control contributes to increase of the facility stability in the present situation. I analyzed equipments and systems for understanding about the power plant. Then, I analyzed the inspection and verification test necessary for the plant operation. Based on the research result, there will be an effect of the fault prevention ahead of time through the understanding of the flow from each grid and the facility. Also, this thesis suggests some solution methods the failure occurrence situation.