A synchronous display system for multi-view frames and a synchronous displaying method for multi-view frames are provided. The synchronous display system for the multi-view frames comprises a server, a first electronic device and a second electronic device. The server provides a plurality of display streamings of a content in a plurality of angles. The server stores accounts. The first electronic device logs in a relation account of the accounts of the server. The second electronic device logs in the relation account of the server. The first electronic device and the second electronic device are grouped in a synchronization operation group. The server provides the plurality of display streamings in the plurality of angles to the first and the second electronic device which log in the relation account respectively and display the frames of the content in the plurality of angles on the first and the second electronic device. Any electronic device of the synchronization operation group performs an operation on one of the electronic devices of the synchronization operation group through the relation account of the server.