The mechanism of balance controlling and maintaining during human motion is quite complex, and many physiological and non-physiological factors such as aging, apoplexy and limb disability can lead to balance dysfunctions.Thus, the functional tests and evaluation on balance plays a vital role in the diagnosis and evaluation of many diseases. The common equipment and methods for investigating balance funciton of human body, as well as their limitations were summarized, and the design and method of serveral light-weight, low-cost, novel systems such as wearable motion capture systems based on microelectronic sensors and human balance measuring and training systems based on somatosensory games were also proposed in this paper.