A tracking system, comprising: a wearable electronic device, wherein the wearable electronic device comprises an anchor array, a processor and a display device; and the tracking system further comprises at least one tag device (21), wherein the at least one tag device (21) is disposed in a physical object, the physical object being a controller of the wearable electronic device, wherein the anchor array is configured to transmit a plurality of request wireless signals, wherein each of the request wireless signals includes a transmitting time of that said each of the request wireless signals, and wherein in response to receiving the request wireless signals by the at least one tag device (21), the at least one tag device (21) is configured to transmit a plurality corresponding response wireless signals, in response to receiving the corresponding response wireless signals by the anchor array, the processor is configured to calculate a plurality of distances between the at least one tag device (21) and each of a plurality of anchor devices (11 -11) of the anchor array according to the request wireless signals and the response wireless signals, wherein the processor is configured to calculate a relative coordinate of the at least one tag device (21) according to the calculated distances and relative to each of the anchor devices (11 -11), and wherein the processor is configured to calculate an absolute coordinate of the at least one tag device (21) according to the relative coordinate and a reference coordinate of a reference point of the wearable electronic device, wherein the reference coordinate is an absolute coordinate of the reference point in a virtual space corresponding to the wearable electronic device, characterized in that in response to identifying the absolute coordinate of the at least one tag device (21) as being in a seen space, as displayed on the display device, of the virtual space by the processor, the processor is configured to instruct the display device to render at least one part of a virtual object corresponding to the physical object into the seen space according to the absolute coordinate of the at least one tag device (21), wherein the at least one part of the virtual object corresponds to at least one part of the physical object, and the at least one tag device (21) is disposed in the at least one part of the physical object, and wherein the at least one tag device (21) and the anchor devices (11 -11) are implemented by the wireless transceivers capable of transmitting and receiving millimeter wave wireless signals, and a frequency of each of the request wireless signals and each of the response wireless signals is larger than 20GHz. a wearable electronic device, wherein the wearable electronic device comprises an anchor array, a processor and a display device; and the tracking system further comprises at least one tag device (21), wherein the at least one tag device (21) is disposed in a physical object, the physical object being a controller of the wearable electronic device, wherein the anchor array is configured to transmit a plurality of request wireless signals, wherein each of the request wireless signals includes a transmitting time of that said each of the request wireless signals, and wherein in response to receiving the request wireless signals by the at least one tag device (21), the at least one tag device (21) is configured to transmit a plurality corresponding response wireless signals, in response to receiving the corresponding response wireless signals by the anchor array, the processor is configured to calculate a plurality of distances between the at least one tag device (21) and each of a plurality of anchor devices (11 -11) of the anchor array according to the request wireless signals and the response wireless signals, wherein the processor is configured to calculate a relative coordinate of the at least one tag device (21) according to the calculated distances and relative to each of the anchor devices (11 -11), and wherein the processor is configured to calculate an absolute coordinate of the at least one tag device (21) according to the relative coordinate and a reference coordinate of a reference point of the wearable electronic device, wherein the reference coordinate is an absolute coordinate of the reference point in a virtual space corresponding to the wearable electronic device, characterized in that in response to identifying the absolute coordinate of the at least one tag device (21) as being in a seen space, as displayed on the display device, of the virtual space by the processor, the processor is configured to instruct the display device to render at least one part of a virtual object corresponding to the physical object into the seen space according to the absolute coordinate of the at least one tag device (21), wherein the at least one part of the virtual object corresponds to at least one part of the physical object, and the at least one tag device (21) is disposed in the at least one part of the physical object, and wherein the at least one tag device (21) and the anchor devices (11 -11) are implemented by the wireless transceivers capable of transmitting and receiving millimeter wave wireless signals, and a frequency of each of the request wireless signals and each of the response wireless signals is larger than 20GHz.