Model updating method and device for multimedia information and server

The invention relates to a model updating method and device for multimedia information and a server, and belongs to the technical field of Internet. The method comprises the steps of obtaining at least two historical behavior characteristics of a first account, wherein different historical behavior characteristics are used for representing operation behaviors of the first account in different historical time periods; for each historical behavior feature, a historical feedback feature corresponding to the historical behavior feature is obtained, the historical feedback feature is used for representing a feedback behavior of the first account when the first account receives a recommended first multimedia file, and the first multimedia file is recommended for the first account through a first multimedia recommendation model based on the historical behavior feature; generating a feature sequence according to each historical behavior feature and a historical feedback feature corresponding to each historical behavi