With the expanding of the smart grid construction, the technology of Intelligent Power Meter field has been continuously expanding. Thus developing put forward many new technical requirements, which traditional DL/T 645 protocol cannot effectively solve. This paper introduces the application of IEC 62056 in domestic, analysis and compares the differences between IEC 62056 communication protocol with DL/T 645 and IEC 61850. Some problems in actual application of IEC 62056 standard are summarized through thus research of convert DL/T 645 to IEC 62056 protocol model、IEC 62056 consistency test tools、IEC 62056 Meter Reading System and so on,