Estimating a location of a device indoor by measuring a location of a terminal based on a starting point using a sensor, receiving a signal from the device located in the room through short-range communication, storing a plurality of first locations in which the signal is received from the device and an intensity of the signal, determining a center point of a plurality of second locations in which the intensity of the signal is equal to or greater than a reference value at a corresponding location among the plurality of first locations or belonging to a higher reference range are selected in descending order of the intensity of the signal from the plurality of first locations, and determining an estimated location for the device using a probability distribution model.