This study was conducted to study the environment effects on live weight, carcass weight, dressing percentage, eye muscle area, backfat thickness, and marbling score, which are the carcass traits of Hanwoo, based on the estimates and all the possible regression for the selection of variable and significance test for 231,382 heads that underwent the carcass measurements. The average and standard deviation for the live weight, carcass weight, dressing percentage, eye muscle area, backfat thickness, and marbling score were 654.79${pm}$91.61 kg, 362.30${pm}$67.15 kg, 59.52${pm}$0.03%, 81.79${pm}$12.21 $cm^2$, 11.39${pm}$5.40 mm, 4.38${pm}$2.29, respectively. The live weight, carcass weight, dressing percentage, eye muscle area, backfat thickness, and marbling score for cow were 532.79${pm}$78.38 kg, 313.40${pm}$44.90 kg, 56.50${pm}$0.03%, 75.24${pm}$10.69 $cm^2$, 11.82${pm}$5.10 mm, 4.30${pm}$2.06, respectively, while for bull were 619.74${pm}$93.27 kg, 376.89${pm}$48.62 kg, 58.61${pm}$0.02%, 85.61${pm}$10.46 $cm^2$, 5.64${pm}$2.71 mm, 1.41${pm}$0.83, respectively, and for steer were 681.78${pm}$70.72 kg, 415.23${pm}$49.43 kg, 60.19${pm}$0.02%, 88.29${pm}$10.27 $cm^2$, 12.71${pm}$5.23 mm, 5.42${pm}$1.99, respectively. In the environmental variables selection based on the variables selection method, the examination by carcass traits suggested that the most appropriate model could be determined when five variables were selected for the live weight, carcass weight, dressing percentage, eye muscle area, and four variables for backfat thickness, and marbling score. When they were considered at a time altogether based on multiple traits, it was deemed to be desirable to insert all five variables into the variables for analysis. In addition, high significance was found by carcass traits.