WiMi Hologram Cloud Inc. has developed a computer vision-based 3D human-computer interaction system that uses VR technology to build a natural and intuitive 3D interaction environment. The primary functions of the system include human contour extraction, human behavior detection, and 3D HCI in a VR environment. The determined interaction information is sent to the VR system through image acquisition, image pre-processing, motion target recognition, interaction behavior detection, and other processing.