A display device; a control method thereof; a contents supplying system, and a contents supplying method thereof smoothly executing contents are disclosed. The display device includes: a display unit which displays a video; a user input unit which receives an input of a user; a communication unit which communicates with a first contents supplying server storing a plurality of contents and a second contents supplying server supplying the contents; and a control unit which displays a contents menu including contents information related to the plurality of contents in the display unit. The control unit demands supplying of contents selected among the plurality of contents depending on an input of a user, to the second contents supplying server, and receives the selected contents transmitted from the first contents supplying server to the second contents supplying server from the second contents supplying server by streaming data.