The present invention refers to ball number based on real estate service based on service method relates to real estate in system, such as based on the present invention refers to a real estates online real estate object name based on the CPU number heating and house lease or real estate and to under public affairs number, item transaction number on the online price rights to a previous and textured to can be conveniently by buying, a definite number name number based on real estate transaction price textured textured approves to real estate agency official fee free, safe as well as a textured after previous price rights to number, item registration according to various embodiment is characterized under public affairs number can be real estate credit loan product.