A three-dimensional, 3D, infrared touch system, comprising: an infrared module arranged to establish a first infrared net and a second infrared net over a display device, for sensing a user touch operation and an infrared recognition module arranged to recognize the user touch operation; wherein the infrared module comprises: an infrared ray transmitting unit comprising one row of infrared ray transmitters arranged to transmit infrared rays; an infrared ray receiving unit comprising two rows of infrared ray receivers (121, 122) arranged to receive the infrared rays, the two rows of infrared ray receivers (121, 122) arranged to include a first row of infrared ray receivers and a second row of infrared ray receivers; a plurality of total reflection light guide plates arranged to reflect the infrared rays; wherein the total reflection light guide plates includes a first group of total reflection light guide plates and a second group of total reflection light guide plates and a transflective light guide plate; wherein the infrared ray transmitters are arranged to transmit the infrared rays to the transflective light guide plate, the transflective light guide plate is arranged to reflect a first set of infrared rays, the total reflection light guide plates of the first group are arranged to reflect the first set of infrared rays to the first row of infrared ray receivers and to establish the first infrared net over the display device; wherein the transflective light guide plate is arranged to transmit a second set of infrared rays, the plural total reflection light guide plates of the second group are arranged to reflect the second set of infrared rays to the second row of infrared ray receivers to establish the second infrared net over the display device; and wherein the first infrared net is nearer to the display device than the second infrared net. an infrared module arranged to establish a first infrared net and a second infrared net over a display device, for sensing a user touch operation and an infrared recognition module arranged to recognize the user touch operation; wherein the infrared module comprises: an infrared ray transmitting unit comprising one row of infrared ray transmitters arranged to transmit infrared rays; an infrared ray receiving unit comprising two rows of infrared ray receivers (121, 122) arranged to receive the infrared rays, the two rows of infrared ray receivers (121, 122) arranged to include a first row of infrared ray receivers and a second row of infrared ray receivers; a plurality of total reflection light guide plates arranged to reflect the infrared rays; wherein the total reflection light guide plates includes a first group of total reflection light guide plates and a second group of total reflection light guide plates and a transflective light guide plate; an infrared ray transmitting unit comprising one row of infrared ray transmitters arranged to transmit infrared rays; an infrared ray receiving unit comprising two rows of infrared ray receivers (121, 122) arranged to receive the infrared rays, the two rows of infrared ray receivers (121, 122) arranged to include a first row of infrared ray receivers and a second row of infrared ray receivers; a plurality of total reflection light guide plates arranged to reflect the infrared rays; wherein the total reflection light guide plates includes a first group of total reflection light guide plates and a second group of total reflection light guide plates and a transflective light guide plate; wherein the infrared ray transmitters are arranged to transmit the infrared rays to the transflective light guide plate, the transflective light guide plate is arranged to reflect a first set of infrared rays, the total reflection light guide plates of the first group are arranged to reflect the first set of infrared rays to the first row of infrared ray receivers and to establish the first infrared net over the display device; wherein the transflective light guide plate is arranged to transmit a second set of infrared rays, the plural total reflection light guide plates of the second group are arranged to reflect the second set of infrared rays to the second row of infrared ray receivers to establish the second infrared net over the display device; and wherein the first infrared net is nearer to the display device than the second infrared net.