The invention provides a three-dimensional space 
positioning system based on 
infrared image recognition. The three-dimensional space 
positioning system based on the 
infrared image recognition is used for recognizing the three-dimensional space position of a target object and comprises a first 
infrared camera, a second infrared camera, a third infrared camera, an infrared 
laser device, a 
projection screen and a computer, wherein the 
image plane of the third infrared camera faces towards the direction of the 
projection screen, the 
image plane of the first infrared camera and the 
image plane of the second infrared camera face towards the direction of the target object, the 
optical axis of the first infrared camera and the 
optical axis of the second infrared camera are strictly perpendicular to the 
projection screen, the infrared 
laser device is arranged at the position of the target object and points to the position of the projection screen, and the computer is connected with the first infrared camera, the second infrared camera and the third infrared camera. The three-dimensional space 
positioning system based on the 
infrared image recognition has the advantages that the target object is identified according to the infrared 
laser device, positioning is carried out through the receiving of the infrared cameras, and thus the three-dimensional space positioning 
system based on the three-infrared-camera 
positioning technology is provided. Through the 
visualization operation carried out on complex data through the computer and a real-time interaction environment, vivid three-dimensional 
visual perception is achieved, and the real-time capture of motion is achieved.