Nuclear power station unit control method and system

The invention discloses a nuclear power station unit control method which is used for simultaneously controlling at least two generator units. The method includes acquiring operating state parameter information of at least two generator units, judging whether the generator units are in usable state or not according to the operating state parameter information of the generator units, generating a switching instruction according to a judgment result, and switching control authority of at least two generator units to site devices according to the switching instruction. Besides, a nuclear power station unit control system is disclosed. According to the nuclear power station unit control method and the system, when main generator unit is in a heavy repair period or is unusable, the auxiliary generator unit can be used for monitoring and controlling site device condition, and the safety performance and economic benefits of the nuclear power station are improved.