A content sharing system may include an electronic device and a display device for sharing content of the electronic device. The electronic device may be configured to transmit first information, including a request to receive content or a request to generate a new channel for content output, to the display device via a server, which provides a service for managing at least one external device registered for each piece of subscriber information, when it is confirmed that a user of the display device is subscribed to the service and the display device is registered to the server. The display device is configured to perform at least one of storing the content or generating the new channel for content output upon receiving the first information via the server.