This study was performed to examine the effects of recombinant bovine somatotropin (rBST) and fermentedalcoholic feedstuff(FAF) on blood metabolites, carcass characteristics and profitability. Sixteen Hanwoos(bulls; 8,steers; 8) with average 143㎏ of body weight were randomly assigned to bull control group(BC), steer controlgroup(SC), bull group(BrA) treated with rBST and FAF, and steer group(SrA) treated with rBST and FAF.Sustained release rBST(0.03㎎/㎏/body weight) was administered biweekly and dose of rBST was adjustedmonthly according to body weight increase. The blood glucose content was higher in the groups treated withrBST and FAF than control groups. The blood cholesterol contents tended to be lower in the treatment groups(BrA, 120.5 mg/dl; SrA, 104.0 mg/dl) than in the control groups (BC, 141.0 mg/dl; SC, 125.5 mg/dl). Nosignificant difference between the groups of bulls and steers were found in the blood triglyceride concentrationsas well as the albumin contents. The rib eye area of BC and BrA were 70 and 72 cm2, respectively, which areslightly larger than the area of SC and SrA. The treatment did not affect the backfat thickness both in bullsand steers. The marbling scores of BC and BrA appeared as No. 1 and No. 2, respectively, and No. 3 and No.4 were obtained in SC and SrA. Lower non saturate fat concentrations were observed in the treatment groups(BrA, 64.30%; SrA, 59.59) than in control groups (BC, 58.98%; SC, 58.09%). Saturated fatty acids and amino acidscontents were slightly more improved in the treatment than in the control. Average auction prices of BC andBrA were 7,900 and 8,089 wons per 1kg of carcass, respectively, whereas the prices of SC and SrA were 9407and 9866 wons per 1kg of carcass, respectively. It is concluded that the treatment with rBST and FAF can improvethe growth performance such as marbling scores and rib eye area and increase the auction prices.