Power plant condition alarm control method and system of nuclear power station

The invention discloses a power plant condition alarm control method and system of a nuclear power station. The method comprises the following steps: obtaining alarm signals and the operation parameters of a current set; according to the obtained operation parameters and preset calculation logic, automatically calculating the operation conditions of the current set, and obtaining calculation conditions, the calculation conditions comprising preset normal conditions, abnormal conditions and non-redefined conditions; receiving conditions which are manually selected by an operator and comprise a normal condition and an abnormal condition; if the obtained alarm signals are under the calculation conditions or the manually selected conditions, the alarm signals being valid, and allowing alarming; and otherwise, the alarm signals being invalid, and inhibiting the alarm signals. The method and system provided by the invention can reduce unreasonable alarming and accordingly reduces workload of the operator.