Abstract: A stretchable and flexible sensing device includes a first elastic membrane, a first strain sensor and a processing unit. The first elastic membrane has a first surface, a second surface and a plurality of electrode contacts. The first surface and the second surface are disposed of opposite to each other and the electrode contacts are disposed on the first surface. One of the electrode contacts is as ground terminal. The first strain sensor is disposed on the first surface by printing technology so as to electrically connect to the electrode contacts. The processing unit is electrically connected to the electrode contacts. The processing unit operates according to a stretch resistance value of one of the first strain sensor.