In　this　paper,　we　introduced　a　system　of　coherent　optical　detection　with　homodyne,　which　implementing　coherent　optical　communication,　our　own　design　based　on　the　principle　of　coherent　optical　communication.　IN　the　system,　PCI6111E　was　useed　as　a　data　acquisition(DAQ)　module.　Alice　and　Bob＇s　control　procedure　by　their　computers　under　the　LabVIEW.　The　synchronous　detection　and　DAQ　were　carried　out　on　the　system.　The　signals　were　processed,　displayed　and　measured.　The　Experimental　results　show　that　by　light-synchronization　and　LabVIEW　procedure　control,　each　function　module　work　together　in　cooperation,　include　Alice＇s　acousto-optic　modulator　and　electro-optical　modulator,　Bob＇s　data　acquisition　and　phase　adjustment　by　PZT.　The　coherent　optical　information　could　be　transitted　by　Alice　and　real-time　demodulated　by　Bob.