Data that indicates an action state of a user is acquired by a user terminal. Area stay information that includes position information of an area in which the user stays and stay time information of a time during which the user stays in the area is acquired. The data acquired by the user terminal is stored, and the stored data is read according to the acquired area stay information. A behavior status of the user is determined based on the read data, and a behavior status time-series pattern that indicates the behavior status of the user is created. A behavior feature value that indicates a feature of a behavior of the user is calculated based on the created behavior status time-series pattern. An area interest level that indicates a degree and tendency of the user's interest in the area is determined using the calculated behavior feature value.
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