Abstract: The embodiments of the present disclosure provide roller-skating device and electric balance vehicle, including: footboard, one or more ground contacting elements, first sensor, one or more driving elements and first controller. Footboard is coupled to first sensor and ground contacting elements which are coupled to driving element, and first controller is coupled to first sensor and driving element. Footboard is configured to stand on one foot, and to tile forwards or backwards in the case of one foot standing; one or more ground contacting elements are configured to act due to actuation of driving element; first sensor is configured to sense posture of driver on footboard; one or more driving elements are configured to generate output signal for controlling action of ground contacting elements and maintaining entire roller-skating device in balance; and first controller is configured to control generation of output signal depending on posture.