The invention discloses a low-power consumption bidirectional real-time wireless sensing method. The low-power consumption bidirectional real-time wireless sensing method includes a plurality of sampling periods, and the sampling period includes that a CMD starts a wireless receiving module at the time T1 according to a set sampling time parameter; after passing the time delay of which the length is TD, a WDAU is started to enter a measuring state; after the WDAU finishes measuring, the WDAU enters a wireless receiving/transmitting state at the time T2+TSM; the WDAU immediately turns off the wireless module to enter a low-power consumption dormant state after finishing communicating with the CMD; the CMD turns off the wireless module to enter the low-power consumption dormant state after finishing communicating with the WDAU and passing the time delay of which the length is TD. The low-power consumption bidirectional real-time wireless sensing method realizes the synchronous work of the WDAU and CMD, and accordingly both the WDAU and CMD can locate at the low-power consumption dormant state at ordinary times; the low-power consumption bidirectional real-time wireless sensing method increases a plurality of timed receiving time slots for the WDAU in the measuring gap, and the bidirectional wireless communication is realized based on guaranteeing the low power consumption of the WDAU.