【Objective】The objective of this study was to provide a theoretical reference for breeding disease diagnosis and mitigation measures for goats under high temperature and high humidity condition. This study was carried out to investigate the effects of temperature and relative humidity (RH) on growth performance, routine urine, blood routine and serum biophysiological- biochemical indexes in goats. 【Method】According to 4×4 factorial design of four temperatures (26℃, 30℃, 34℃ and 38℃ ) and four RH levels (35%, 50%, 65% and 80%), eight goats of one and a half years old from first filial generation of healthy Boer goat × Sannen dairy goat with similar body weight were allotted, and randomly divided into 2 groups (each group contained four replicates with one goat per replicate). The adjustment period lasted for 30 days in the natural environment. The experiment period of every group was 5 days and was treated 24 hours a day. And the experiment was carried out by turns in artificial environment chambers according to the processing method. Every goat’s weight was recorded before and after trial begin, and feed intake and water intake were also recorded every day. On days 3 and 5, blood was drawn from the jugular vein to determine the blood routine, and the serum samples were used to determine the serum indexes. Data were analyzed using IBM SPSS Statistics 21.0 software.【Result】(1) The interaction of temperature and RH significantly affected average daily feed intake (ADFI) and average daily water intake (ADWI) (P<0.05), but no significantly affected on average daily gain (ADG), weight ratio and blood routine indexes (P>0.05). ADG of goats at every treatment group of 38℃ was significantly lower than that at every treatment group of 26℃ (P<0.05). ADFI of goats at 38℃ was significantly lower than that at 26℃ and 30℃ (P<0.05). The white blood cell counts (WBC) of goats at 65% and 80% RH were significantly lower than those at 35% RH (P<0.05). (2) On day 3, the interaction of temperature and RH significantly affected content of potassium (K), activity of alanine aminotransferase (ALT), and aspertate aminotransferase (AST) in serum of goats (P<0.05). The content of K in serum of goats at 38℃ and 80% RH was significantly lower than that at other groups (P<0.05). The glucose (GLU), globulin (GLO), urea nitrogen (BUN), calcium (Ca) and alkaline phosphatase (ALP) in serum of goats at 38℃ was significantly lower than that at 26℃ and 30℃ (P<0.05). The GLU and BUN in serum of goats at 80% RH was significantly lower than that at 35% RH (P<0.05). On the day 5, the interaction of temperature and RH significantly affected content of total protein (TP), albumin (ALB), GLO, BUN, Ca, K, phosphorus (P), sodium (Na) and activity of lactate dehydrogenase (LDH) in serum of goats (P<0.05). The GLU, chlorine (Cl), ALT, AST, ALP and creatine kinase (CK) in serum of goats at 34 and 38℃ was significantly lower than that at 26℃(P<0.05). The GLU and Cl in serum of goats at 60% and 80% RH were significantly lower than those at 35% RH (P<0.05). (3) On the day 3 and 5, the concentrations of total antioxidant capacity (T-AOC), superoxide dismutase (SOD), glutathione peroxidase (GSH-Px) and catalsae (CAT) in serum of goats at 38℃, 80% and 38℃, 65% were significantly lower than those at every group at 26℃ (P<0.05). The concentration of malonaldehyde (MDA) in serum of goats at 34 and 38℃ was significantly higher than that at 26℃ (P<0.05).(4)As the temperature rose, the ADFI, ADG, TP, GLO, BUN, GLU, ALT, T-AOC, SOD and CAT in serum were deceased, but average daily water intake and MDA in serum were risen. As the RH rose, the ADFI, GLU, Cl, T-AOC and GSH-Px in serum were deceased, but TP, LDH and MDA in serum were risen. (5) The TP, ALB, GLO, BUN, GLU, TC, TG, Ca, P, ALT, AST, ALP, LDH and CK in serum on the day 5 was lower than that on the day 3, but the MDA in serum was higher on the day 3 and T-AOC, SOD and GSH-Px in serum on day 5 in 34 and 38℃ was higher on day 3.【Conclusion】Temperature, RH and their interaction affected the average daily intake, average daily water intake, serum biochemical indicators and antioxidant indicators of goats. The high temperature and high humidity environment had adverse effects on the growth performance and antioxidation function of goats, and the effect was the most serious for the goats at 38℃ with 80% RH. Moreover, with the extended duration of higher temperature and humidity, the goats showed more extensive stress effect.