The invention discloses a wearable device, which comprises a strip-shaped structure, a main body, a micro air pump, an airbag, a sensor and a driving control module, wherein the main body is connected to the outer surface of the strip-shaped structure and is provided with an accommodating space; the micro air pump is arranged in the accommodating space of the main body; the airbag, relative to the micro air pump, is arranged on the inner surface of the strip-shaped structure and communicates with the strip-shaped structure; the driving control module is arranged in the accommodating space of the main body; the sensor is arranged on the driving control module and is connected to the micro air pump, wherein the micro air pump acts under the control of the driving control module, so that gas is transmitted to the air pump from the micro air pump and the airbag, which gets expanded as being inflated, is fixed to special part of a wearing user; and physiological information of the wearing user is sensed by virtue of the sensor, and the physiological information is transmitted to the driving control module, so that the physiological information is recorded.