A termite detection device, detection system and detection method. The termite detection device (1) comprises: an outer casing (11) and bait strip (13) in the outer casing. A first circuit board (121) and a detection switch (122) are disposed on the bait strip. A deep hole (131) having a closed bottom is provided in the bait strip, and a vertically movable support member is filled in the deep hole to support an object to be tested (133). The first circuit board is electrically connected to the detection switch to determine an on or off state of the detection switch. The termite detection system comprises: the termite detection device, a detector (2) and a database (3), wherein the termite detection device sends a signal of the detection switch to the database via the detector. The termite detection method comprises: triggering, by a detector, a termite detection device, or automatically triggering the termite detection device, determining, by a first circuit board, an on or off state of a detection switch, and sending, by the detector, the same to a database for processing and storage. In the present invention, a power-off state is remained while detection is not performed, and the on or off state of the detection switch is not based on whether power is supplied or not. In addition, no environment condition is required, and the oxidation problem does not exist, thus providing a long service life.
