The present invention is to provide a method of enabling a plurality of electronic devices to play an online game at the same time, which is implemented in a server and a plurality of electronic devices at a remote end of a network. Each of the electronic devices comprises a network card so that the electronic devices are able to connect to the server. In response to receiving game instructions sent from the electronic devices by the server, the server processes game data for obtaining updated data based on the game instructions, and then sends the updated data to each of the electronic devices. As such, a CPU of each of the electronic devices can receive the updated data, show a game screen on a display thereof and interactively play an online game.