The improvement and implementation of IEC61850 standards promote the information sharing and interoperability of IED devices in the substation, making the secondary equipment detection technology become as intelligent as possible in smart substation. The intelligent test system for secondary equipment of the smart substation is discussed on the system architecture and test process, and the corresponding solution for the critical problems of the universal test template development and the test cases file generation is proposed. Based on the smart substation SCD file management and graphics presentation technology, the system combines the actual needs of the field inspection, refines the test items, loads and executes the template test case file, and realizes the closed-loop automatic test of IED. Now the system has been successfully applied on the periodic test for smart substation secondary equipment in State Grid Liaoning Electric Power Co., Ltd., and test effect is ideal. This work is supported by Natural Science Foundation of Liaoning Province (No. 2015020076) and Project of Education Department of Liaoning Province (No. JL201615407).