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An embodiment of the present invention is directed to providing a localization apparatus for accurately detecting a location of a node selectively using neighbor nodes having less obstacle factors in a sensor network, and a method thereof.

Another embodiment of the present invention is directed to providing a localization apparatus for accurately obtaining the location information of a target node with a less number of reference nodes by selectively using reference nodes having less obstacle factors, and a method thereof. Other objects and advantages of the present invention can be understood by the following description, and become apparent with reference to the embodiments of the present invention. Also, it is obvious to those skilled in the art to which the present invention pertains that the objects and advantages of the present invention can be realized by the