Provided is an apparatus for a home network middleware interoperability service using a home gateway and an OSGi platform and method thereof, the apparatus comprising: a plurality of home network devices in which various types of middlewares are mounted; a home gateway in which a plurality of middleware bundles for supporting the various types of middlewares and an OSGi platform are mounted, and with which information on the home network devices is transferred to an external network; and a service provider connected to the home gateway via an external network and receiving information on the home network devices and downloading to the home gateway the middleware bundles appropriate to the user's home network to provide the middleware interoperability service.