The utility model discloses a generator excitation system test electric quantity monitoring and analysis system. The generator excitation system test electric quantity monitoring and analysis system comprises a computer and a data acquisition and uploading module connected with the computer, wherein the data acquisition and uploading module is connected with a direct-current voltage conversion circuit and a direct-current current conversion circuit which are used for measuring direct-current quantity of a generator excitation system, a switching quantity conversion circuit which is used for measuring the switching quantity of passive nodes and active nodes, as well as an alternating-current voltage conversion circuit and an alternating-current current conversion circuit which are used for measuring the alternating-current quantity of the generator excitation system. The generator excitation system test electric quantity monitoring and analysis system of the utility model can directly measure direct-current voltage values under 3000V, and completely has a capacity of directly measuring the action voltage value of a rotor over-voltage protection device in rotor over-voltage protection test; and the generator excitation system test electric quantity monitoring and analysis system can measure the switching quantity of the active nodes and can measure and record related switching quantity signals in excitation system low excitation, over-excitation limiting, channel switching and analog TV wire fracture test.