PURPOSE : An intermediation service method is provided to recognize a voice transmitted over a PSTN(Public Switched Telephone Network), and to register the recognized voice on a bulletin board of other web site.CONSTITUTION : The method comprises several steps. If a call connection is realized between a wired telephone or a mobile phone and an ARS(Automatic Response System) server(ST110). An ARS server offers stored guidance messages to the connected telephone or mobile phone(ST120). The user tells data, e.g., a location of a real estate to be sold, via the telephone or mobile phone, and then the ARS server recognizes the voice data(ST130, ST140). The voice data or the data input via dial button is transmitted to a data server, and standardized(ST150). The data server selects a web site corresponding to the input data(ST160), and transmits the input data to a data receiver of the selected web site over a network(ST170).? KIPO 2004