A multimedia middleware apparatus (513) using metadata, a control method and a storage medium are provided which can receive metadata in multimedia middleware (513) provided in a terminal (510), easily add/delete/change a service, and effectively maintain and manage middleware components. When an open multimedia terminal (510) processes multimedia contents, a multimedia middleware service structure for expressing information of a name, configuration, version and application programming interface, or API, update is configured in the form of metadata. Lists of standard and non-standard services of multimedia middleware are then generated and managed.