Apparatus and method for managing lifespan of content, and content lifespan management system

A content lifespan management system gives life to a first content on the basis of a user's preference for the first content. When life is given to the first content, the content lifespan management system increases or decreases the lifespan of the first content on the basis of the user's preference for the first content, which is computed after life is given to the first content.