1. A multimedia redirection method, comprising: receiving a virtual-desktop login request of a user, wherein the virtual-desktop login request comprises an identifier of the user; acquiring, according to the identifier of the user, metadata of a multimedia instance that is not shut down by the user before a last disconnection, wherein the metadata comprises path information of a multimedia file corresponding to the multimedia instance; and sending the metadata to a client of the user so that the client acquires, according to the metadata, multimedia data corresponding to the metadata and plays the multimedia data.