1. A method for aligning gesture features of image, comprising the steps of: capturing an input gesture image; determining a closed curve formed by a binary contour image of the gesture image by preprocessing the gesture image; drawing a curvature scale space (CSS) image of the gesture image based on the closed curve; performing a convolution operation with respect to the sequence of a coordinate-peak set formed by the CSS image and a predefined function F(x) to designate the coordinate with maximal value of integration as a basis point for obtaining feature parameters of the gesture image; and comparing each feature parameter of the gesture image with each feature parameter of a plurality of reference gesture shapes for determining a gesture shape corresponding to the gesture image.