Energy intake of Black-necked Bar-tailed Pheasants(Syrmaticus humiae),was measured in biological garden of Guangxi Normal University from Oct.2005 to Sep.2006.Six 4-year adults and six juveniles kept in cage were involved this experiment.The amount of food taken by pheasants was calculated by subtract the remaining from the food provided every day.All the excrements of trial pheasants were daily collected.The energy contained in the food and excrements was measured to get the net energy intake.The results showed that the gross energy consumption,metabolic energy and excrement energy varied seasonally and that was increase as temperature decreasing.There is significant difference in gross energy consumption,metabolic energy,excrement energy between adults and juveniles.There is a trend that the food digestibility of pheasants was increases as temperature increasing.In the same season,the food digestibility of adults was higher than that of juveniles.A minimum metabolic energy was detected in the 4-year adults and juveniles group in August.A further study is need to determine whether 30℃ is the optimal temperature for the Black-necked Bar-tailed Pheasants.