Method and system capable of realizing circuit domain backspacing and circuit domain backspacing detection

The invention discloses a method and a system capable of realizing circuit domain backspacing. The method comprises the following steps that: a circuit domain operation request is respectively launched by a long-term evolution network control terminal, the terminal is triggered and redirected to be a specified global mobile communication system network; the terminal is modulated to the specified global mobile communication system network, and circuit domain business is built in the global mobile communication system network. In the method and the system disclosed by the invention, the terminal can be ensured to backspace to a third generation communication system network or the global mobile communication system network for circuit domain business; similarly, in the method and the system, a circuit domain backspacing detection technology can be achieved, and the terminal can also be ensured to backspace to the third generation communication system network or the global mobile communication system network for circuit domain business.