A system of computerized balance function evaluation is introduced. 86 normal chinese adults divided into two age groups tested by the system under 6 standing postures, and a series of normal values of 7 balance parameters and 3 curve diagrams were then obtained. No statistical difference could be found in the values of parameters between male and female. A comparison between the old-age group and the middle-aged and young group revealed no significant difference in each parameter at the time of open eyes with the two feet standing side by side. In terms of closed eyes with the two feet standing side by side, one foot standing in front and the other behind, and single foot standing, the parameters between the two age-groups showed significant difference (p less than 0.05-0.01). The advantages of the system and the value of its application in medical practice, sport medicine, aesthetic medicine, judicature and especially in geriatrics are discussed.