Handwritten handwriting signature is input through electronic equipment, which will collect multi-dimensional behavior characteristic information such as strokes, stroke order, pen pressure, pen speed and signature time during the writing process of the signer, and form a data packet. After the collection, the signature font has the function of handwriting recognition. The biometric information of the signature is extracted by algorithm, the causes of handwriting are traced by the principle of graphology, the handwriting trends and writing habits are analyzed, and intelligent comparison is made, which can effectively identify whether it is signed by the signer.