A space is set substantially in a tropical rain forest type environment to
activate human's essential brain region and realize an environment
suitable for the human's brain by arranging a device for setting the
tropical rain forest type environment based on characteristics of
activating human's essential brain region responsive to tropical rain
forest type environment information, in the space such as urban space,
housing space or other living space. The tropical rain forest type
environmental information has higher density and higher complexity than
those of urban space type environmental information, and includes at
least one of auditory information, visual information, and super
perceptual information of aerial vibration. The tropical rain forest type
environmental information is comfortable for the human with no excessive
stress, and is environmental information for effectively functioning on
prevention and treatment of diseases due to stress by realizing the
environment comfortable for the human's brain.