A　tetrapod-like　ZnO　nanostructures　prepared　by　hyperthermia　vapour　phase　oxidation　process　were　used　as　the　field　emission　cathode　material.　The　field　emission　cathode　panel　prototype　is　fabricated　with　ZnO　slurry　printed　and　sintered.　We　packed　the　cathode　panel　and　the　fluorescence　panel　on　which　was　printed　with　phosphor　power　as　a　5　inch　field　emission　display　of　diode　structure.　The　field　emission　experiments　were　done　and.　the　panel　realized　stable　field　emission,　it　could　display　simple　characters.　The　turn-on　electric　field　of　diode　structure　ZnO-FED　is　1.5V/mu　m.　When　the　electric　field　reaches　5.3V/mu　m,　the　emission　current　density　can　approach　to　5.11　mu　A/cm(2).　We　had　obtained　the　electric　field　enhance　factor　about　6772　by　the　experiment.　It　has　shown　from　the　experimental　results　that　tetrapod-like　ZnO　nano-material　has　good　electron　emission　performance　and　it　is　also　a　beautiful　field　emission　cathode　material.