Electric energy metering system operation and maintenance method and system based on online monitoring

The invention provides an electric energy metering system operation and maintenance method and system based on online monitoring. The method comprises the following steps: acquiring a misjudgment rate and a missed judgment rate of an electric energy metering system; according to the obtained misjudgment rate and the missed judgment rate, the occurrence probability of various system updating scenes is calculated; calculating the expected cost rate of the system in the unit cycle check interval time according to the occurrence probability of each system update scene; taking the minimum expected cost rate as a target to obtain an optimal period verification interval time, and performing periodic verification according to the optimal period verification interval time; according to the method, the operation and maintenance model is established under the condition of'online monitoring ', the operation and maintenance cost with'missed judgment rate' and'misjudgment rate 'is quantitatively depicted, and the optimal o