Relay communication protocol method capable of changing header

The invention discloses a relay communication protocol method capable of changing a header. Transmission data is packaged according to a certain data format; messages are partitioned into request messages and response messages according to message types; the messages are partitioned into switching quantity messages and digital quantity messages according to message modes; according to different message request or response modes, packaging of different types of data is completed; each field represents a different meaning; transmission of invalid data can be effectively reduced; and the data messages are added with check codes and message data transmission is checked, so that accuracy of the data transmission process is ensured. The relay communication protocol method disclosed by the invention is simple and easy to operate, can work under various communication protocols and is not limited to a platform; communication traffic can be reduced; electric energy is saved; and moreover, data interaction between heter