The present invention discloses a method and system for generating an indoor radio card, a method for locating a target in the interior according to the method for producing an interior radio card and a system for locating a target in the interior according to the system for generating an indoor radio card represents. to reduce the influence of the effect of the multipath transmission to the places of the interior space and for improving the accuracy of the Ortens in the interior space, the present invention is a technique for processing data for locating a target in the interior and a technique for locating a target in the interior based provided on the above technique. The method for producing an interior radio card performs for the measured by the mobile node to at least a position of wireless signal strength based on by the mobile node on adjacent positions measured wireless signal strengths of a smoothing process by in order to reduce the influence of the effect of the multipath transmission.