Handwriting recognition method and system, client side and server side

The invention relates to a handwriting recognition method and system, a client side and a server side. The method comprises the steps that: the client side sends a handwriting recognition request to the server side; the server side receives a handwriting recognition request sent by the client side; the server side sends the feature extraction model and the feature value of the target character to the client side; the client side receives the feature extraction model and the feature value of the target character; and the client side receives a handwritten character to be recognized, loads the feature extraction model to obtain a feature value of the handwritten character to be recognized, and matches the feature value of the handwritten character to be recognized with the feature value of the target character to recognize the handwritten character to be recognized. According to the technical scheme provided by the invention, the problem of data leakage caused by transmitting the handwritten data of the client