A monitoring system includes a monitoring apparatus (2) and a monitoring bougie (1). The monitoring apparatus (2) includes a first interface (21) detachably connecting the monitoring bougie (1), a signal processing module which receives and processes a collected signal transmitted by the monitoring bougie (1) to obtain a processed signal, and a display module which displays the processed signal. Since the monitoring bougie (1) and the monitoring apparatus (2) are connected detachably, the monitoring apparatus (2) can be removed from the monitoring bougie (1) during CT, MR or other inspection that affects or is affected by an electronic circuit, thereby causing no influence on the inspection result.
