In　this　paper　the　current　development　of　the　steady　state　migration　test　was　reviewed.　Experiments　were　carried　out　for　a　series　of　concrete　mixes　with　the　steady　state　migration　test　in　which　conductivity　sensor　technology　is　applied.　With　the　developed　steady　state　migration　test,　conductivity　in　anolyte,　loop　current　and　temperature　can　be　monitored　in　real　time.　The　experimental　results　are　conductive　to　understand　the　mechanism　of　chloride　migration　during　both　unsteady　state　and　steady　state.　The　conductivity　of　anolyte　could　be　used　to　calculate　the　chloride　concentration　in　anolyte　and　the　theoretical　correlation　between　them　was　explained.　Over　all,　the　developed　steady　state　migration　is　an　effective,　convenient,　well-defined　in　theory　and　plentiful　with　information　method　which　could　be　used　to　determine　the　chloride　diffusion　coefficient　of　cementitious　materials.