A data frame of creating and analyzing arithmetic in communication between electronic meter and concentrator or between application software and firmware is put forward. Using the face to face method, the arithmetic separates the data and program and supports the protocol detail data by extra data source. So the program can only focus on the arithmetic detail not on the protocol data. This arithmetic can be widely applied and is all-purpose. Encapsulated object can be used in application software and the design theory can be used in firmware communication program. It also give the process of module creating and key arithmetic flow in this research.