1. An IP generating system comprising at least one development apparatus and an IP (Intellectual Property) providing apparatus, said development apparatuses including: IP generating means for generating IP design data in accordance with generating conditions of the IP design data; and applied condition notifying means for transmitting applied condition data indicating an applied condition of said IP generating means, and said IP providing apparatus including: management means for managing the applied condition data transmitted from said development apparatus; search means for searching for said development apparatus having the IP generating means that must be revised with reference to the applied condition data said management means manages; and transmission means for transmitting revision information as to the IP generating means to said development apparatus searched for by said search means.