The invention provides a method for evaluating the protection measurement and control alternating current sampling state of an intelligent transformer substation. Through the online analysis of a dispersion degree based on alternating current sampling homologous data, the protection measurement and control alternating current sampling state of the intelligent transformer substation is subjected toonline evaluation. Through online tour monitoring alternating current sampling, on the basis of the homologous data dispersion degree, the state evaluation of the measurement and control alternatingcurrent sampling state of the intelligent transformer substation can be realized, the problem that relay protection measurement and control equipment alternating current sampling lacks an effective operation state online evaluation method for a long term is solved, resource waste caused by periodic maintenance and an influence on the reliable operation of a power grid are avoided, meanwhile, the advantages of the sampling digitization and the online monitoring of the intelligent transformer substation are utilized, hidden dangers in alternating current sampling can be found in time through online state evaluation, and a new thought can be explored for the relay protection state overhaul of the intelligent transformer substation.