The embodiment of the invention discloses a soaking method, a device and equipment, wherein, the method comprises: generating low frequency alternating current signal, coupling the low frequency alternating current signal to a sounding electrode through a transformer; judging whether soaking occurs by monitoring the size of resistance between sounding electrodes. As the embodiment of the invention adopts low frequency alternating current sounding signal, electrode corrosion and polarization do not occur on the sounding electrode, thus the monitoring result is correct with no false alarm, and the leading-out distance of the sounding electrode can be effectively increased; the low frequency alternating signal and the monitored medium can be separated by a transformer, thus improving monitoring safety and reliability.