The cobia culture is the largest of Peng-Hu cage culture, Due to the fish growth veryfast and to sold restrictions. We have to raise culture fish quality and the processingutilization.The handling of post harvest technology and the fresh contained of eachfarm culture cobia, Still have much to improve place.This research have three kinds of different cobia dizzy method, blow to the head,stunned by electrocution and to anesthetize. Search suitable to beat to dizzy methodand after dizzy treatment. Compare with round fish, spinal cord destruction and thedressed cobia, the rigor mortis changes difference. And implement panel test to certifythe after treatment effect of fresh and quality.Besides this, make different refrigeration temperature of cobia, survey the rigor index、pH、ATP and VBN changed, and investigate cobia after death the best refrigerationtemperature. This way can offer the farm culture after handling of post harvest andprocessing plant contained fresh operation method, that to secure culture fish the bestquality and raise fish product value.