There are a lot of attempts to study the human responses in hot and humid environments. Epstein et al. [11] studied the effect of different heat loads on vigilance and complex cognitive tasks. 9 subjects were asked to expose to three climatic conditions and shoot at targets of three different sizes randomly. The results indicated that the heat load had no effect on the easy work but had a great effect on the difficult work, in addition, the effect of the task intensity and heat load on deteriorating performance are synergistic. Vangelova et al. [12] investigated the dyslipidemia (abnormal blood lipids) of the industrial workers in hot environments. 102 male industrial workers exposed to heat and a control group of 102 male workers were studied. The results showed that the heat exposed workers run a higher risk of becoming dyslipidemic than the control group. Brake and Bates [13]monitored the deep body core temperatures of 36 industrial workers continuously, and the results indicated that the values regularly exceeded the commonly recommended limits (a temperature of 38.0 °C or an increase of +1 °C) with the average maximum deep body core temperature was 38.3 °C, the maximum temperature rise was 1.4 °C, and the maximum heat storage was 431 kJ. Kalkowsky and Kampmann [14] carried out a study to record the physiological strain of miners. 38 miners were asked to participate during 125 shifts, and the heart rate and rectal temperature were measured continuously. The results showed that the average heart rate and rectal temperature during all shifts were 102.8 beats/min and 37.7 °C, the mean sweat loss per shift was 3436 g and the mean sweat rate was 494 g/h. Saha et al. [15] evaluated the physiological strain of different categories of miners.