The invention belongs to the technical field of nuclear power station pipeline detection and provides a nuclear power station pipeline detection method and a nuclear power station pipeline failure maintenance method. The nuclear power station pipeline detection method includes the steps that technological parameters of a nuclear power station pipeline during operation are collected; the technological parameters are pre-classified to obtain monitoring data of the nuclear power station pipeline; a nuclear power station pipeline attribute database is established according to the monitoring data;and the actual properties of the nuclear power station pipeline are monitored on the basis of the nuclear power station pipeline attribute database. Through the nuclear power station pipeline detection method and the nuclear power station pipeline failure maintenance method, the problems that in the prior art, long time is consumed and the process is too complicated during detection of the nuclearpower station pipeline can be effectively solved.