Our research focus on the analysis of utilized component in skin or bone of cobia,development the processing of cobia instant-seasoned skin and soften bone product, andthen to set up shelf-life of final product, respectively.Than, search suitable to beat todizzy method ,and after dizzy treatment. make different refrigeration temperature ofcobia, survey the rigor index、pH、ATP and VBN changed, and investigate cobiaafter death the best refrigeration temperature,that to secure culture fish the best qualityand raise fish product value.The last is to estimate equation of water and lipid contentsfor cobia is obtained as the index of non-destructive quality assessment index by usedthe electromagnetic scan (EM-scan). We hope this project will diversify utilization ofcobia.