A content upload system includes: a content distributing server that is installed in an airplane and distributes audio-video contents into the airplane; and a plurality of content accumulating servers that are installed in a plurality of airports, in which the airplane is parked, and transmit the audio-video contents to the content distributing server through a network. The content distributing server selectively writes audio-video contents that have not been stored in the content distributing server of audio-video contents transmitted from the content accumulating server while the airplane is parked on the airport.