A　liquid　material　identification　system　based　on　electrical　capacitance　tomography　technique　is　proposed.　The　structure　of　the　sensor　is　discussed,　and　the　parameters　of　designed　capacitance　tomography　technique　sensor　are　listed.　The　key　parameters　affecting　the　sensor　performance　and　sensitivities　are　analysed.　The　performances　of　the　sensor　are　simulated　by　COMSOL,　and　the　practical　performance　of　the　capacitance　tomography　technique　sensor　is　demonstrated　in　the　experiments.　The　image　reconstruction　results　are　given　which　indicate　the　feasibility　of　the　capacitance　tomography　technique　system　applied　in　liquid　material　identification.