Automatic welding equipment for container and automatic welding method

The invention discloses automatic welding equipment for a container and an automatic welding method, wherein the automatic welding equipment includes an X-axis traveling mechanism, a Y-axis travelingmechanism which is slidable on the X-axis traveling mechanism, a Z-axis traveling mechanism which is slidable on the Y-axis traveling mechanism; a weld seam identification device and a welding devicewhich are arranged on the Z-axis traveling mechanism and are slidable on the Z-axis traveling mechanism; and a control device which is configured to respectively control the movement of the X-axis traveling mechanism, the Y-axis traveling mechanism and the Z-axis traveling mechanism, so that the weld seam track of the plate to be welded is determined by controlling the weld seam identification device to slide on the plate to be welded and to contact with the edge of the plate to be welded, and the welding device is controlled to automatically carry out welding operation along the weld seam track after the weld seam tra