Keyboard device and anti-shaking method for projection frame of the same

The present invention relates to a keyboard device and an anti-shaking method for a projection frame of the keyboard device. The keyboard device includes a keyboard body, a projection module, a vibration sensor, and a microprocessor. The anti-shaking method for a projection frame includes steps of: generating a vibration signal in response to a vibration of the keyboard device; and dynamically adjusting an image signal according to the vibration signal and outputting the adjusted image signal to the projection module for generating a shake-free projection frame. Therefore, the shaking problem of the projection frame caused by operating the keyboard body can thus be ameliorated so as to improve stability of the projection frame. The present invention is particularly suitable for a compact portable electronic device to improve performance of prior art.