1. A people counter using a Time Of Flight (TOF) camera, comprising: an image receiving unit configured to receive image information about an image having an object moving across an area under a TOF camera disposed on a ceiling; an object information collector configured to collect depth information and size information of the object from the image information received through the image receiving unit; a corrector configured to correct the depth information and the size information of the object to actual depth information and actual size information in consideration of the height and the Field Of View (FOV) of the TOF camera; a filter configured to filter the actual depth information of the object within a predetermined filtering range and create a resultant image information for counting from the filtered depth information; a counting unit configured to extract a head-shaped object pattern from the resultant image information obtained by the filter, and count the extracted head-shaped object pattern as a person by matching the extracted head-shaped object pattern with head-shaped templates, comparing the matched head-shaped object pattern with preset circular contour pattern, and recognizing a portion of the matched head-shaped object pattern as a head of a person; a line providing unit configured to provide a base line that a moving object moves across in the resultant image information; and a standard width providing unit configured to provide a standard for the width of the moving object to be counted, to the resultant image information, wherein the counting unit is configured to create detection information of the object recognized as corresponding to a person, receive the image information about the image having the object from the image receiving unit, and indicate the object corresponding to the detection information in the received image information and display the indicated image information on a screen, wherein the counting unit is configured to count the moving object as a person when a pattern for the variations of data accumulated for the moving object is identical with predetermined pattern within a predetermined error range, wherein the standard width providing unit is configured to provide a first standard width for counting one moving object, a second standard width set less than the first standard width not for counting, and a third standard width set higher than the first standard width for counting a plurality of moving objects, and wherein the counting unit is configured to when the width of the moving object is within the third standard width, recognize, the moving object as the plurality of objects across the base line.