In modern warfare, if a country does not have a superb C3I system, once the war comes, it will fall into chaos and the consequences will be unimaginable. On the contrary, with a reliable C3I system, commanders can command and control their troops deployed anywhere from a command post in China. C3I system can closely link command organs at all levels with relevant units in the command post, and make the whole military system run faster, more accurately, more flexibly and effectively. In times of crisis, appropriate analysis can be made to ensure national security with the most effective measures.