The purpose of this study was to investigate the energy expenditure of daily physical activities by using K4b2 and Aerosport apparatus. Subjects were 198 males and 200 females with ages of 20~70 and BMI of 21~25 kg/m^2. Rest metabolic rate, television watching, up and down stairs, surf the Internet, floor sweeping, furniture cleaning, floor cleaning, dish washing, vegetable cutting and cooking, cloth washing, car washing, driving, hula hoop swing, cycling, golf, bowling, tennis, inline skating, walking(4km/h), Yen-Chi dancing, wai-dan kung, fishing, hiking, Tai-Chi Chuan etc. were included. At least 15 minutes of rest before testing was guaranteed and then followed 10 minutes of air collection for steady state O2 and CO2 analysis. In addition to METs as indicator for intensity of physical activity, for reference for health promotion and weight control, energy expenditure of each physical activity was exhibited by 30 minutes of duration and by 300 kcal of energy expenditure.