An information output system is provided which allows a user to recognize information appropriately while reducing or eliminating inconvenience given to the user. A content output system includes a content output controller 213 which selects output candidate content on the basis of the movement mode of the user and the content position, causes an output unit 25 to output supplementary information on the output candidate content when the relative positional relationship between the user and the output candidate content satisfies a predetermined first condition, and causes the output unit 25 to output the output candidate content when the relative positional relationship between the user and the output candidate content satisfies a predetermined second condition.