1. A method for extracting and matching gesture features of image, comprising the steps of: (A) capturing an input gesture image; (B) determining a closed curve formed by a binary contour image of the gesture image by preprocessing the gesture image; (C) drawing a curvature scale space (CSS) image of the gesture image based on the closed curve; (D) determining feature parameters of a plurality of sets of the gesture image by extracting first plural peaks from the CSS image as basis points; and (E) comparing each feature parameter of the plurality of sets of the gesture image with each feature parameter of a plurality of reference gesture shapes represented as a basis point of a maximal peak for determining a gesture shape corresponding to the gesture image.