A human tracking apparatus, comprising: an upper body location detection module arranged to detect at least one piece of upper body location for a human; a leg location detection module arranged to detect at least one piece of leg location for the human; a tracking object selection module arranged to select a tracking object based on the at least one piece of upper body location and the at least one piece of leg location; and an operation module arranged to operate the human tracking apparatus for tracking the tracking object selected by the tracking object selection module; wherein the leg location detection module comprises: a laser generator for transmitting a laser beam horizontally a camera arranged to pick up a laser line generated by the laser generator; a leg picture obtainer arranged to obtain the pickup laser line picture through the camera as a leg picture; and a leg candidate detector arranged to detect information of the at least one piece of leg location of the leg picture obtained by the leg picture obtainer as a leg candidate, wherein the leg candidate detector is arranged to detect information of the at least one piece of leg location by calculating a distance Zp between the human tracking apparatus and the laser line and right and left distance Xp between the human tracking apparatus and the laser line, obtaining a two-dimensionally mapped picture by mapping the calculated distances Zp and Xp two-dimensionally, grouping and clustering the two-dimensionally mapped picture, and comparing diagonal lengths of clustered picture regions with previously determined leg pattern attribute. an upper body location detection module arranged to detect at least one piece of upper body location for a human; a leg location detection module arranged to detect at least one piece of leg location for the human; a tracking object selection module arranged to select a tracking object based on the at least one piece of upper body location and the at least one piece of leg location; and an operation module arranged to operate the human tracking apparatus for tracking the tracking object selected by the tracking object selection module; wherein the leg location detection module comprises: a laser generator for transmitting a laser beam horizontally a camera arranged to pick up a laser line generated by the laser generator; a leg picture obtainer arranged to obtain the pickup laser line picture through the camera as a leg picture; and a leg candidate detector arranged to detect information of the at least one piece of leg location of the leg picture obtained by the leg picture obtainer as a leg candidate, wherein the leg candidate detector is arranged to detect information of the at least one piece of leg location by calculating a distance Zp between the human tracking apparatus and the laser line and right and left distance Xp between the human tracking apparatus and the laser line, obtaining a two-dimensionally mapped picture by mapping the calculated distances Zp and Xp two-dimensionally, grouping and clustering the two-dimensionally mapped picture, and comparing diagonal lengths of clustered picture regions with previously determined leg pattern attribute. a laser generator for transmitting a laser beam horizontally a camera arranged to pick up a laser line generated by the laser generator; a leg picture obtainer arranged to obtain the pickup laser line picture through the camera as a leg picture; and a leg candidate detector arranged to detect information of the at least one piece of leg location of the leg picture obtained by the leg picture obtainer as a leg candidate, wherein the leg candidate detector is arranged to detect information of the at least one piece of leg location by calculating a distance Zp between the human tracking apparatus and the laser line and right and left distance Xp between the human tracking apparatus and the laser line, obtaining a two-dimensionally mapped picture by mapping the calculated distances Zp and Xp two-dimensionally, grouping and clustering the two-dimensionally mapped picture, and comparing diagonal lengths of clustered picture regions with previously determined leg pattern attribute.