In order to prevent leakage of confidential data, a meeting system includes a MFP and a projector. The MFP includes a data obtaining portion to obtain data, a participant information obtaining portion to obtain user identification information as participant information, an access permission determination portion and an output permission determination portion to determine whether or not a user identified by the participant information can access the obtained data, to determine that the obtained data can be output if the determination result shows that all the meeting participants can access the obtained data, and to determine that the obtained data cannot be output if any one of the meeting participants cannot access the obtained data, and an output portion to output data on condition that it is determined by the output permission determination portion that data can be output. The display device displays an image based on the data output from the data processing apparatus.