The test system is mainly applied to control cabinets supporting generator sets, electric power, metallurgy, etc. For the control cabinet internal wiring and function testing. The test uses the combination of PLC and industrial control computer to achieve automatic special testing, while generating test reports and accurately identifying the line fault points, which not only saves the line inspection time, but also provides guarantee for the factory qualified rate of products, and further provides scientific and efficient testing means for the traditional control cabinet line inspection.