The present invention discloses a method and a system for detecting skin color, and the skin color detection method includes the following steps: obtaining an image; according to an image standard, performing parameter correction to the image; based on image pixels, performing table look-up color to a skin color probability statistical table to generate a table look-up result; according to at least one automatic correction standard, judging the table look-up result to produce a judgment result; and correcting the color probability statistical table according to the judgment result.