1. A method of providing a TV-Anytime metadata service, the method comprising: a) including an identifier of a requested field among a plurality of fields of a metadata table in a request message of a get_Data operation in the TV-Anytime service according to a Simple Object Access Protocol; b) receiving the request message; c) in response to the request message, searching for the requested field and extracting a value of the requested field from the metadata table as a query result value, by using the identifier of the field; and d) transmitting the query result value using a response message of the get_Data operation, wherein the query result value comprises the value of the requested field of the metadata table, but does not include a value of another field among the plurality of fields of which an identifier is not included in the request message, and wherein the requested field element comprises: a unit requested field element, which designates an ID of a field to be searched for, as a sub-element, and a requested path element for designating a path of a field to be searched for, as a sub-element.