There is provided a print system for transmitting and receiving a data object by a PTP between a camera-equipped mobile phone (CP) and a PD printer and printing an image by the PD printer according to image data supplied from the CP. First information indicating presence/absence of the direct print function capable of printing by transmitting image data from the CP directly to the PD printer and second information indicating presence/absence of the cooperated processing function with the CP and the PD printer are embedded in a data object which is transmitted and received. When it is judged that the received object contains the first and the second information, the CP and the printer are set to the direct print function and the cooperated processing function mode.