The utility model discloses a bolt and nut quick detecting system that resonates, including signal driver unit and signal response part, the signal driver unit is used for producing drive signal, and drive signal produces the resonance signal on being used in and being surveyed the structure, and signal response part is received the resonance signal and is handled back output processing signal. The utility model discloses can carry out high efficiency, the swift detection to the little component of metal ( bolt and nut ), eliminate the potential safety hazard of especially high strength connecting bolt, the existence of nut in use, still can solve each big oil field well control and equip in accessory the little member of the metal problem of batch short -term test greatly.