In this paper the influence of temperature on oxygen consumption and ammonia excretion of juvenile Girella melanichthys in hunger and satiety were studied. The results show that rate of oxygen consumption in both fasting and over fed fish, rate of ammonia excretion in the fasting fish is increased with the temperature between 15℃ and 30℃(P<0.01)and reaches to the peak at 30℃. While the rate is decreased when the temperature is at 32℃. For fasting fish, the ammonia excretion go up with temperature ascending in the range between 15℃ to 32℃(P<0.01),and arrives to the peak at 32℃. The results confirm that 30℃ is the optimal temperature for the fish growth.