Flaw detecting system and method

The invention discloses a flaw detecting system for detecting a crystal silicon product and a method for detecting the crystal silicon product. The method comprises the steps of: slightly vibrating a fixed crystal silicon product by a microvibration exciter, so that the crystal silicon product generates an exciting signal; capturing the exciting signal by a capturing device, so that an analyzing detector is used for analyzing the exciting signal captured by the capturing device by a special analysis method in a time frequency way to obtain an analysis result; and detecting the flaw state of the crystal silicon product according to the analysis result.