The invention discloses a judging method and a system of a shield machine tunneling state, and relates to the technical field of shield construction. The judging method comprises the steps that shieldthrust and cutterhead torque are subjected to treatment, the influences of tunneling rate and the cutterhead rotating speed are removed, and meanwhile the concepts of standard thrust and standard torque are proposed, the shield machine tunneling state based on a self-tunneling parameter is distinguished in real time, a preliminary judgment to the shield machine tunneling state is rapidly, conveniently and accurately carried out by analyzing data, the shield machine tunneling parameter can be adjusted or a corresponding construction measure can be adopted in time, and safely and efficiently processing tunnel construction is guaranteed.