To provide a method for preventing disease, which can detect a life rhythm of a subject with higher accuracy.SOLUTION: A method includes an activity information acquisition step (step S901) to obtain activity information about the activity performed by a subject based on an acceleration applied to the subject from the activity information obtained in the activity information acquisition step; an information extraction step (step S903) to extract and activity amount information about the amount of activity in the time zone at which the activity took place based on the activity amount information and time zone information; a classification step (step S905) for classifying the activities into one of the plurality of groups that are set in advance activity information; and a classification step (step S907) for outputting the information about the disease prevention support information corresponding to the group.SELECTED DRAWING: Figure 7
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