The invention relates to a sensor test system and method. The test system comprises a ground power supply module, a sensor module, a data collecting module, a parameter setting module, a sampling rate determining module, a demand determining module, a test module and an output and storage module. The sensor test method includes the steps that the parameter setting module conducts initial setting, test demands are determined, and a voltage signal output by the whole sensor module is collected; the collected voltage signal is input into the test module for testing, and test results are finally analyzed. By means of the sensor test system and method, the no-less-than-250-circuit sensor output voltage is measured, the single-sensor working performance is detected, the requirements that the system test circuit number can be increased and is easily increased can be met, and the test efficiency is high.