1. A method of providing a TV-Anytime metadata service, the method providing a search on a field basis of a table using a get_Data operation in the TV-Anytime metadata service, comprising the steps of: a) including, as a sub-element, a requested field element for designating a field of a table, in a requested table element as a query result value of the get_Data operation, wherein the field is a part of the metadata table; b) receiving a request message of the get_Data operation; c) extracting a field designated in the requested field element from the table designated in the requested table element as a query result value in response to reception of the request message; and d) transmitting the extracted query result value using a response message of the get_Data operation, wherein the extracted query result value includes only a value in the designated field of the metadata table among entire fields of the metadata table, 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.