A position/pose acquisition unit acquires a position and a pose of a viewpoint in a real space. A site data disposition unit disposes site data which is three-dimensional data representing a shape of a construction site in a virtual space on the basis of the position and the pose of the viewpoint. A machine data disposition unit disposes machine data which is three-dimensional data representing a shape of a work machine at a position corresponding to the site data in the virtual space. A rendering unit renders the disposed machine data.