The present disclosure provides a smart automatic frequency control (AFC) apparatus, including: a phase shift module, connected to a first signal input terminal and configured to: receive an incident wave from the first signal input terminal, perform a phase shift on the incident wave according to a phase shift parameter so as to generate a phase-shifted signal, and output the phase-shifted signal to a phase detection module; and the phase detection module, connected to the phase shift module and a second signal input terminal and configured to: receive a reflected wave from the second signal input terminal, perform a phase detection on the phase-shifted signal and the reflected wave so as to generate a phase difference signal, and output the phase difference signal via a control interface.