A wearable device is disclosed and comprises a monitoring main body, gas actuator, an airbag, a driving and controlling module, and a sensor. The monitoring main body comprises a main body slot. At least a gas communication hole is disposed on an outer frame of the main body slot, and inside the gas communication hole is covered with a protective membrane so that the space inside the main body slot is waterproof and dustproof. The gas actuator is disposed inside the monitoring main body, and the gas is introduced into the main body slot for being transmitted by the gas actuator. The airbag is disposed outside the monitoring main body and is in communication with the gas actuator. The gas actuator is actuated for transmitting the gas to gather within the airbag so that the airbag is gas-filled and is inflated outside the monitoring main body. The driving and controlling module controls the actuation of the gas actuator. The sensor is controlled by the driving and controlling module and directly detects the change of the gas pressure of the gas transmitted by the gas actuator to calculate physical information of a user.一種穿戴式裝置，包括：監測本體，包括有主體框槽，主體框槽之外框至少設置氣體連通孔，而氣體連通孔內覆蓋防護膜，構成主體框槽內形成密封防水、防塵；氣體致動器，設置於監測本體之主體框槽中，並使氣體透過氣體連通孔導入主體框槽內由氣體致動器集中傳輸； 氣囊，設置於監測本體外部與氣體致動器連通，氣體致動器驅動運作傳輸氣體集中於氣囊內，使氣囊充氣鼓脹於監測本體外；驅動控制模組，控制氣體致動器之驅動運作；以及感測器，透過驅動控制模組控制，並直接感測氣體致動器驅動運作傳輸氣壓變化而計算穿戴使用者之生理資訊。
