A bicycle and its electronic driving operation system are disclosed. The bicycle electronic driving operation system includes a front assembly and a rear assembly. The front assembly has a display panel, wherein the front assembly is detachably mounted on a hand-bar stem of the bicycle. The rear assembly has a rear camera module and a projection warning area light, wherein the rear assembly is detachably mounted on a seat post of the bicycle. The rear camera module is configured to capture surrounding images. The display panel is electrically connected to the rear camera module and configured to display the surrounding images captured by the rear camera module, and the projection warning area light are configured to project towards two lateral sides of the bicycle to mark a warning area on a ground on the two lateral sides of the bicycle.