Abstract: In this paper, TPM model and principal component analysis are used to determine the strategies to adjust the food system,and the problems of the global food system are studied. Firstly, the four indexes are analyzed quantitatively and the TMP model is established. The four indexes of the food system are summarized into ten principles. Secondly, the index data are analyzed by SPSS to obtain the principal components. Finally, the ratio of variance contribution rate to cumulative contribution rate is used to establish the calculation method of sustainability.