Embodiments of the present invention disclose a fall-off detection method for a wearable device and a wearable device. The method includes: collecting physiological parameter information and activity information of a wearer of the wearable device when an abnormality is detected in the physiological parameter information of the wearer of the wearable device and a time of the abnormality exceeds a preset time, determining that the wearable device falls off from the wearer when it is determined that the wearable device falls off from the wearer, determining, according to the collected physiological parameter information and activity information of the wearer of the wearable device, a scenario mode that the wearer is in and sending, according to the scenario mode that the wearer is in, an indication corresponding to the scenario mode. By means of the method, when a wearable device falls off, a scenario mode that a wearer is in can be determined, and an indication can be sent to an external system.
