Since artificial intelligence has been integrated into virtual reality, a new branch of virtual reality, which is called inverse virtual reality (IVR), is created. A typical IVR system contains both the intelligence-driven virtual reality and the physical reality, thus constructing an intelligence-driven mutually mirrored world. We propose the concept of IVR, and describe the details about the definition, structure and implementation of a typical IVR system. The paral-lei living environment is proposed as a typical application of IVR, which reveals that IVR has a significant potential to extend the human living environment.