Interoperability is the key objective of IEC 61850 standard. In this case different manufactures must perform various necessary tests to support interoperability. By analyzing the results of former interoperability tests of IEC 61850 which have been carried at home and abroad and summarizing the achievements of five interoperability tests in China， the necessity is pointed out that more complicated and deep-level interoperability tests should be performed and the testing scheme as well as the way to implement are given in detail， providing beneficial probe into the engineering application of systematized IEC 61850 in China.