A multifunction apparatus 21 includes: a web browser section 5; a second web server section 8; and a setting information database 6 for storing Cookie information which is transmitted from a first web server section 53 of an information processing apparatus 51 to the web browser section 5. The web browser section 5 (i) receives, from the first web server section 53, control information for informing the second web server section 8 of a control instruction to control the multifunction apparatus 21, and (ii) informs the second web server section 8 of the control instruction. Then, in a case where the control instruction is an instruction to transmit image data, a control application section 23 and an apparatus control section 7 (i) determine, as specific Cookie information, Cookie information that (a) is stored in the setting information database 6, and (b) contains a domain name of the information processing apparatus 51 which is designated as a destination to which the image data is transmitted, and (ii) transmits the image data, to which the specific Cookie information is added, to the information processing apparatus 51.