Updating method, device, system and equipment for classifier

The invention discloses an updating method, device, system and equipment for a classifier, and belongs to the technical field of computers. An equipment control method comprises the following steps that updating information is obtained from a server, and the updating information comprises junk short message characteristics and the weight corresponding to the junk short message characteristics; the junk short message classifier is updated according to the obtained updating information; received short messages are classified according to the junk short message classifier. Due to the facts that the junk short message classifier is updated through the updating information obtained from the server and the received messages are classified through the junk short message classifier, the problems that the junk short message classifier in a mobile phone terminal only has a few training samples, and accuracy is low in the classification process of short messages are resolved, and the effect of improving accuracy of clas