A web service-enabling digital video/audio-processing apparatus, and web service method and system therefor are provided. A first communication module receives a web service address from an external device to carry out a certain function; a web service engine checks whether a file contained in the received web service address exists in a function list, and outputs the web service address to a first engine unit if the file exists. The first engine unit parses the web service address and generates a web language corresponding to the function; a function setting unit sets the function based on the web language; and a control unit performs the set function.