A method for transmitting service discovery information to a client in a hybrid delivery multimedia transmission system, comprising: generating service discovery information related to a service, the service discovery information including service type information indicating that the service is provided by a plurality of channels including a first channel and a second channel in a plurality of networks including a first network and a second network, the first channel being different from the second channel and the first network being different from the second network; and transmitting the service discovery information to the client; wherein one or more first service components of the service are transmitted to the client via the first channel of the first network and one or more second service components of the service are transmitted to the client via the second channel of the second network, the one or more first service components being different from the one or more second service components, and wherein the service discovery information further includes relation information indicating a relationship between content of the one or more first service components and content of the one or more second service components, and network and address information for accessing the one or more first service components and the one or more second service components, wherein the first network is a broadcast network and the second network is a telecommunication network, wherein the network and address information for accessing the one or more first service components includes information about a frequency, an Internet protocol, IP, platform, and an IP address, and wherein the network and address information for accessing the one or more second service components includes a uniform resource locator and an IP address. generating service discovery information related to a service, the service discovery information including service type information indicating that the service is provided by a plurality of channels including a first channel and a second channel in a plurality of networks including a first network and a second network, the first channel being different from the second channel and the first network being different from the second network; and transmitting the service discovery information to the client; wherein one or more first service components of the service are transmitted to the client via the first channel of the first network and one or more second service components of the service are transmitted to the client via the second channel of the second network, the one or more first service components being different from the one or more second service components, and wherein the service discovery information further includes relation information indicating a relationship between content of the one or more first service components and content of the one or more second service components, and network and address information for accessing the one or more first service components and the one or more second service components, wherein the first network is a broadcast network and the second network is a telecommunication network, wherein the network and address information for accessing the one or more first service components includes information about a frequency, an Internet protocol, IP, platform, and an IP address, and wherein the network and address information for accessing the one or more second service components includes a uniform resource locator and an IP address.