Nuclear power plant accident regulation important information online recording system and method

The invention discloses a nuclear power plant accident regulation important information on-line recording system and a nuclear power plant accident regulation important information on-line recording method. The system comprises a data extraction module used for obtaining unit parameters and/or information, a regulation recording module used for judging whether an accident occurs or not and executing the data extraction module, and a processing module used for processing the unit parameters and/or information obtained by the data extraction module according to a first preset rule, the logic processing module is used for acquiring the pre-estimated unit parameters and/or information; and the information display module is used for displaying the unit parameters and/or information acquired by the data extraction module. The logic processing module is further used for comparing the obtained unit parameters and/or information with estimated unit parameters and/or information and executing the information display mo