PROBLEM TO BE SOLVED : To provide a real estate information management system that can one-dimensionally manage real estate data, and to provide a data integrated management system. SOLUTION : An R-institution 1 adds a content to the degree of ' explanation of important item' required to be opened for realizing valid sales contract to the evaluation of real estate, which is supplied from a real estate agent 2, a real estate agent 2, ... and which a building estate dealing manager generates, and takes in it as primary real estate information. An appraisal group constituted of real estate appraiser, first-class authorized architect and builder, authorized building land and estate dealer, lawyer, judical scrivener, licensed tax accountant, and estate building surveyor, supplements lacking information in primary information, outputs secondary real estate information based on the ' real estate book' of a surveyed result and stores it in real estate general center C. The real estate general center C sums up/analyzes the items of real estate based on the primary real estate information and secondary real estate information, which are stored in a data bass 4, and supplies analyzed information to the Civil Service 3 and the real estate agent 2.