Perception method and device

The invention provides a sensing method and a sensing device, which are applied to a wireless local area network system supporting IEEE802.11bf (Institute of Electrical and Electronic Engineers 802.11bf), and can also be applied to a wireless local area network system supporting IEEE802.11ax, IEEE802.11be or other IEEE802.11 series protocols. In the method, a first device receives a first request message used for requesting to establish sensing measurement; sending a first response message to the second device; the first request message is refused to be accepted, and the first response message comprises first indication information and is used for indicating to send the request message for establishing the sensing measurement again or not to send the request message for establishing the sensing measurement any more. In the method, whether the second device initiates the perception measurement establishment request again is indicated through the first indication information, so that the second device clarifies