Steel pipe automatic conveying method and system

The invention provides a steel pipe automatic conveying method and system. The method comprises the steps that information sent by a first sensor, a second sensor and a third sensor is received, and when the conditions that travelling wheels of a slewing car are located at a starting point and steel pipes exist on the slewing car are judged out, the travelling wheels of the slewing car are controlled to move towards a stopping point of a travelling guide rail; when the conditions that the travelling wheels of the slewing car are located at the stopping point and the steel pipes exist on the slewing car are judged out, a roller way of the slewing car is controlled to rotate, so that the steel pipes are driven by the roller way of the slewing car to move to a ground roller way; when the conditions that the travelling wheels of the slewing car are located at the stopping point and the steel pipes do not exist on the slewing car are judged out, the travelling wheels of the slewing car are controlled to move towar