The invention discloses a method and a device for real-time online game, a method and a device for game watching, and a system. The method and the device for the real-time online game, the method and the device for the game watching, and the system have the advantages that by sending game sponsoring information to a server, the range of game participators of an online game project is widened, and the limitation of contact persons on a self directory of a mobile device is broken, so the different-place matching game of a plurality of users on a network is realized; the starting and finishing of the game are controlled by the server, and the real-time game information corresponding to each game participator is received by the server, so the real-time tracking of the competitive state of each game participator in the game process is realized, and the game result is automatically received the first time after the game is finished; by utilizing a network device, the game information is found in real time, and the encouraging information is sent to the corresponding game participator; the different-place real-time game is realized, the real-time property of the game result is high, and the interesting and activity of all people participating in the sports are favorably improved.