A system and a method for analyzing biomechanics. The biomechanics analyzing system for analyzing a motion state of an organism includes a detecting unit, a low-pass filter, a high-pass filter and a processing unit. The detecting unit disposed on a surface of a muscle of the organism detects an acceleration signal. The low-pass filter filters the acceleration signal to produce a low-frequency signal. The high-pass filter filters the acceleration signal to produce a high-frequency signal. The processing unit analyzes a motion posture or a motion frequency of the motion state of the organism according to the low-frequency signal, and analyzes a motion strength of the motion state of the organism according to the high-frequency signal.
