The invention discloses a universalization test system for the endurance performance of an automobile digital instrument, comprising a power source system, an MCU controller, a frequency signal generating module, an adjustable resistance output module, a voltage switching output module, an LCD display module, a keyboard control module, a buzzer, an indicating light driving module and a data storing module. The system is integrally controlled by the MCU controller to control the output of the frequency signal generating module, the adjustable resistance output module, the voltage switching output module, the LCD display module, the keyboard control module, the buzzer, the indicating light driving module and the data storing module according to the instruction input by the keyboard control module; the system can meet the correcting requirements of all non-bus type automobile instruments with easy operation, and can synchronously and automatically finish the automatic detection of the endurance performance of a speed meter, a revolution meter, a water thermometer, a fuel gauge, an oil pressure gauge and a voltmeter in various automobile instruments. At the same time, the invention further discloses a testing method of the test system.