The invention provides a closed-loop hypnotic head cover based on brain electric wave monitoring. The closed-loop hypnotic head cover becomes a daily necessity (in the fields of agriculture, light industry and medical supplies). The closed-loop hypnotic head cover is simple in structure and powerful in function, and the bidirectional interaction between the head cover and a mobile phone is achieved. The head cover is micro and lightweight terminal equipment and is composed of a cover body and an equipment cabin. The cover body is a net-shaped 'cap'. The equipment cabin is a soft cabin body, a built-in brain electrical sensor can acquire delta, theta, alpha, beta and gamma brain electric waves in real time, and the brain electric wave occurrence time and duration in each sleeping stage are recorded; corresponding brain electrical music is played, and brain electric waves are guided from a waking state to a meditation direction, then from a meditation state to a light sleep direction, and finally from a light sleep state to a deep sleep direction; through tracing acquisition, vertical comparison and verification are conducted on brain electrical data, and according to quantitative data and qualitative analysis, an objective assessment is made; through an optimization algorithm, the volume of hypnotic music changes with the change of different brain electricity, the brain electrical music is firstly played to guide the brain electric waves, the brain electrical sensor and a three-dimensional acceleration sensor are used for double acquisition, and the hypnotic effect is analyzed in the aspects of the brain electricity and a body.