Abstract: The abilities of computation and storage for smart card were utilized, the fingerprint template was not only stored in it, but also the fingerprint matching process was implemented on it, but other processes of fingerprint recognition algorithm were performed on an authenticated reader/writer. The pre-process only comprised three parts, the first was a computation of directional field based on discrete directions, then a smoothing operator and enhancing operator were used for the image enhancing along and perpendicular to the ridge of fingerprint, the last was a direct ridge tracking for feature extraction. In the matching process the parameters of rotation and displacement were obtained by two congruent triangles, then the point-pairs matching would be performed on the transformed sets. The matching time and recognition rate on smart card experimentally proved the feasibility for engineering application.