The invention provides a pressurized water reactor nuclear power plant fault procedure and accident handling procedure interfacing method. The method includes the following steps that: whether a corresponding accident handling procedure and fault procedure are required to be executed according to the respective entry criteria of the accident handling procedure and fault procedure is judged; if itis judged that the corresponding accident handling procedure and fault procedure are required to be executed, a set is made to apply the accident handling procedure and fault procedure according to relevant requirements; and when the accident handling procedure is applied, the execution mode of the fault procedure is determined according to the mode of the set. Accordingly, the invention providesa corresponding interfacing system. With the interfacing method and interfacing system of the invention adopted, the accident handling procedure and the fault procedure can be used in a matched mannerorderly, and possible conflicts during the execution of the procedures can be avoided as much as possible.