|The present disclosure provides an automatic powering device including a dielectric layer, a driving layer, a plurality of electrodes and a droplet. The dielectric layer includes a first surface and a second surface opposite to the first surface. The driving layer faces toward the dielectric layer and a channel is formed between the driving layer and the dielectric layer. The driving layer includes a plurality of hydrophilic surfaces facing toward the first surface and a plurality of hydrophobic surfaces facing toward the first surface. Each of the hydrophilic surfaces is staggered from each of the hydrophobic surfaces. The electrodes are disposed at the second surface and are electrically connected to each other. The droplet is flowable within the channel. The droplet can be affected by the hydrophilic surfaces and the hydrophobic surfaces so as to flow in the channel. Therefore, the droplet can be driven by the driving layer.