An analysis is made of the intelligent technical solutions to Suzhoudong substation from the respect of IEC 61850， networking method and intelligent bay， in particularly， the application of following intelligent techniques such as 500 kV fiber optic electronic current transformer， IEC 61850 based unified modeling， IEEE 1588， 500 kV digital line protection， generic object oriented substation event（GOOSE） and sequence control The operation of the fiber optic electronic current transformer is analyzed through a comparison with the traditional current transformer. Suggestions are given to further intensify the intelligent techniques in Suzhoudong substation.