1. An information processing apparatus comprising: an image acquisition unit for acquiring a real space image including an image of another apparatus; a coordinate system generation unit for generating a spatial coordinate system of the real space image acquired by the image acquisition unit; and a transmission unit for transmitting spatial information constituting the spatial coordinate system generated by the coordinate system generation unit to the other apparatus sharing the spatial coordinate system; and an acquisition unit for acquiring the spatial coordinate of the other apparatus, a spatial coordinate of its own apparatus, and an angle of a vector connecting the spatial coordinate of the other apparatus to the spatial coordinate of its own apparatus, wherein the transmission unit transmits the other spatial coordinate, the spatial coordinate of its own apparatus, and the angle of the vector to the other apparatus as the spatial information.