The aim of this study was to examine energy efficiency and economic growth on carbon dioxide emissions in Iran.The study was conducted between 1980 and 2021.The approach used in this research has been ARDL.The data from the research was obtained from the World Bank, and the software used in this research was the avivos software with version 12 to analyze the data obtained.The findings of the study have shown that: In the long term, the effect of energy efficiency on carbon dioxide emissions is positive and meaningful, and the impact of economic growth on carbon dioxide emissions is also positive and meaningful, as well as the results of the relationship of variables in the short term, and the results of its estimates have shown that variables adjust the imbalance error at a rate of 0.54 percent and tend towards the long term. Therefore, according to the results obtained, the hypotheses of the research have been approved.