This paper summarizes the current main methods of heterogeneous data conversion, focuses on the necessity of establishing the data conversion specification for China’s agricultural product quantity safety, as well as specifies the main designs and solutions for data conversion structure, data conversion process and data conversion format in research. Establishing a data conversion specification is a pioneering work of applying modern information technology management methods in the research areas of agricultural macroeconomic policy-making system, which plays a positive role in promoting the study of modern agricultural information system. The establishment of data conversion specification can not only improve the level of agricultural information technology research, but can also create a better research and development environment for the study of agricultural information system.