A method and apparatus are disclosed for providing content services in an A/V network supporting web service techniques. An A/V gateway includes a content information requesting unit which requests information about contents to be provided by web services on a distributed network when a predetermined condition is satisfied; a TCP/IP transceiver which receives an ML document including the information about the contents as a response to the request from a service providing device providing the web services; a web service content managing unit which analyzes the ML document including the information about the contents, and generates a reconstructed ML document on the basis of the analysis result; a SOAP server transceiver which transmits the reconstructed ML document; and an A/V network transceiver which transmits a content stream corresponding to the information about the contents.