A transformable folding electric scooter comprises a motor engine, a connecting frame, and a boarding plate. The connecting frame comprises a handle frame disposed upright and having a handle at a top portion thereof, a front frame extending forward from a lower portion of the handle frame and connected to the motor engine foldably at a first folding position provided on the motor engine, and a rear frame extending rearward from the lower portion of the handle frame. The boarding plate comprises a front plate portion connected to a lower portion of the rear frame fixedly, and a rear plate portion connected to the front plate portion foldably at a second folding position provided between the front plate portion and the rear plate portion of the connecting frame. The rear plate portion is folded upward with respect to the front plate portion at the second folding position.