The present invention relates to an apparatus to manage a transaction value of a real estate. According to one embodiment of the present invention, the apparatus comprises : a real estate condition information management unit to manage real estate condition information including a location, a size, a type, the time of completion, registration particulars, etc.; a real estate market price information management unit to manage market price information including a market price including deal, charter, monthly rent, etc. of the real estate, a sectional first fluctuation rate updating a transaction value at predetermined time intervals, a second fluctuation rate differentiating the first fluctuation rate, and a long and/or short term trend; an investment estimation unit using a current loan amount and a loan limit rate with respect to the real estate to set a loan limit amount, and applying the loan limit amount and incidental expenses to the transaction price to estimate an investment; and a return rate estimation unit to estimate a return rate according to time flow based on the market price information with respect to the real estate. Thus, the investment is estimated by using the condition information and the market price information of the real estate, and a return rate thereby can be estimated.(110) Real estate condition information management unit(120) Real estate market price information management unit(130) Investment estimation unit(140) Return rate estimation unit(150) Analysis report management unit(160) Modeling unit(170) Notification unit(180) Advertisement content management unitCOPYRIGHT KIPO 2017