This application provides a sensing method and a communication apparatus, which are applied to a wireless local area network system supporting IEEE 802.11bf, or may be applied to a wireless local area network system supporting IEEE 802.11ax, IEEE 802.11be, or another IEEE 802.11 series protocol, to optimize a time interaction problem in sensing measurement session termination. The method includes: A first apparatus receives first indication information from a second apparatus, where the first indication information indicates that the second apparatus requests the first apparatus not to send a first message to the second apparatus within first duration after a first sensing measurement session is terminated, or indicates that the second apparatus does not send a first message to the first apparatus within first duration after a first sensing measurement session is terminated.