To reduce the level of nitrogen oxide emission matter from a combustor.

The method for minimizing nitrogen oxide emission matter comprises the steps of monitoring the pressure change in a combustor 10, and regulating the fuel flow introduced to the combustor to stabilize the combustor. The signs of the instability and dilute blowout of the combustor can be detected by monitoring the pressure change in the combustor before they actually occur and the later analysis of the change by signal analyzing means 32. After the signs are detected, the signal is sent to a fuel schedule controller 34 to regulate the fuel flow to the combustor.