Trans-media unmanned aerial vehicle device and control method thereof

A method for operating a trans-media unmanned aerial vehicle device, comprising:

• launching an unmanned aerial vehicle device from water toward air, the unmanned aerial vehicle device comprising:
• a housing, and
• a piston arranged in the housing and capable of reciprocating in the housing, wherein one end of the housing is provided with an opening;
• several flying wings are uniformly arranged in a circumferential direction of the piston;
• the flying wings are rotatably connected to a side of the piston facing the opening and configured to spread or retract;
• and under the pushing of the piston, the flying wings spread to an outside of the housing and retract back into the housing upon release of the piston, wherein the piston comprises a piston head, a piston tail, and a piston rod for connecting the piston head to the piston tail;
• and the piston tail is located outside the housing and is capable of closing the housing, wherein:
• when the unmanned aerial vehicle device rises to a certain height, the piston moves towards the outside of the housing relative to the housing, and the flying wings extend out of the housing and are spread;
• when entering the water, the flying wings are downwards retracted, and the piston moves towards the inside of the housing relative to the housing;
• the flying wings are retracted into the housing;
• and the unmanned aerial vehicle device freely falls into the water.