The invention discloses a multi-parameter human body function detecting device and a detecting method thereof. The device comprises a balance capability testing unit, a human body composition testing unit and a height testing unit which are integrated into a whole, as well as power supplies which supplies electricity for each unit, wherein data tested by each unit is transmitted to an external computer for analysis through a data transmission interface. In the method, a human body stands on a testing platform of a balancing apparatus, and function parameters of the human body are detected respectively by the balance capability testing unit, the human body composition testing unit and the height testing unit.