PROBLEM TO BE SOLVED : To provide a real estate management device and a real estate management system for providing present evaluation information of a customer.SOLUTION : An evaluation information input by a building owner is received and stored in a building performance evaluation database 302 (step 120), and an evaluation information input by a building tenant is received and stored in an attitude survey result database 304 (step 122). An overall evaluation is calculated by a hierarchical analytical method or the like based on the building performance evaluation and the attitude survey result and stored in a building performance overall evaluation database 308 (step 124). The building performance overall evaluation is transmitted and presented to a server 102 or a personal computer of the building owner, the building tenant or the like through the Internet 100 (step 126).