A hypnosis system comprising: - at least one virtual reality system comprising a virtual reality headset, - sensors and devices for measuring continuously and in real time at least one physiological parameter of the patient, - at least one virtual reality control hardware in which a library of hypnosis software is loaded, each of said hypnosis software comprising at least one virtual reality scenario, - at least one calculation and analysis algorithm loaded on said control hardware to determine a hypnosis score indicating a depth of a hypnosis state from the at least one physiological parameter measured by the sensors and devices, and to control the operation of the virtual reality system according to the hypnosis score by: o selecting in real time from the library a scenario or a succession of virtual reality scenarii, according to the value of the hypnosis score; o adapting or modulating in real time the scenario or succession of virtual reality scenarii selected as a function of the evolution of the hypnosis score to place the patient in a state of hypnosis; and o adapting or modulating in real time the scenario or succession of virtual reality scenarios selected as a function of the evolution of the hypnosis score to achieve or maintain a state of deep relaxation of the patient; the hypnosis system being further configured to broadcast the selection made in the virtual reality system headset worn by the patient. - at least one virtual reality system comprising a virtual reality headset, - sensors and devices for measuring continuously and in real time at least one physiological parameter of the patient, - at least one virtual reality control hardware in which a library of hypnosis software is loaded, each of said hypnosis software comprising at least one virtual reality scenario, - at least one calculation and analysis algorithm loaded on said control hardware to determine a hypnosis score indicating a depth of a hypnosis state from the at least one physiological parameter measured by the sensors and devices, and to control the operation of the virtual reality system according to the hypnosis score by: o selecting in real time from the library a scenario or a succession of virtual reality scenarii, according to the value of the hypnosis score; o adapting or modulating in real time the scenario or succession of virtual reality scenarii selected as a function of the evolution of the hypnosis score to place the patient in a state of hypnosis; and o adapting or modulating in real time the scenario or succession of virtual reality scenarios selected as a function of the evolution of the hypnosis score to achieve or maintain a state of deep relaxation of the patient; o selecting in real time from the library a scenario or a succession of virtual reality scenarii, according to the value of the hypnosis score; o adapting or modulating in real time the scenario or succession of virtual reality scenarii selected as a function of the evolution of the hypnosis score to place the patient in a state of hypnosis; and o adapting or modulating in real time the scenario or succession of virtual reality scenarios selected as a function of the evolution of the hypnosis score to achieve or maintain a state of deep relaxation of the patient;