PROBLEM TO BE SOLVED : To provide a house building consulting system which is a business method carried out on the Internet accepting all consultations of a client regarding house building from selection of a house maker to planning or how to form a budget necessary for house building on behalf of the client intending to build a house, and properly carrying out consulting such as advice and guidance regarding house building to the client.SOLUTION : The house building consulting system is characterized by that it comprises the client intending to build a house, supporters such as a house maker, designer, builder, real estate agent, financial institution and administrative organ supporting the house building of the client, and a consultant carrying out negotiations with the supporters, selection, management and a substitute related to the house building on behalf of the client and carrying out consultation, advice and guidance from a viewpoint of the client.