Disclosed is comprehensive mechanized coal mining face support multi place-states and plunger descending amount measuring system and method. The comprehensive mechanized coal mining face support multi place-states and plunger descending amount measuring system comprises a system host, a top beam tilt angle sensor, a shield beam tilt angle sensor and connecting lines; the top beam tilt angle sensor is arranged on the top beam of a support and used for measuring the tilt angle of the top beam; the shield beam tilt angle sensor is arranged on the shield beam of the support and used for measuring the tilt angle of the shield beam; the connecting lines are used for connecting the top beam tilt angle sensor and the shield beam tilt angle sensor with the system host. The comprehensive mechanized coal mining face support multi place-states and plunger descending amount measuring system not only can accurately acquire multi place-states information of supports such as the top beam, the shield beam and a four-bar linkage, but also can accurately acquire support plunger descending amount value and effectively eliminate the defects of high labor intensity, high monitoring costs, poor data real time and low precision in comprehensive mechanized coal mining face support multi place-states and plunger descending amount measurement.