The largest sources of ammonia pollution in China are the excessive application of chemical fertilizer in agriculture and the continuous expansion of the livestock and poultry industry. Over recent years, the atmospheric environment has attracted much attention and ammonia emission research has become increasingly important. This has meant that accurately and scientifically assessing regional ammonia emissions in China has become particularly pertinent. This study was based on related research progress at home and abroad, and compared the characteristics of the main methods used for estimating ammonia emissions in China. The types of data, pollution routes, parameters quantification, and uncertainty analysis were analyzed. Opinions and suggestions for further improvement are put forward on issues such as single calculation methods and insufficient localization of emission factors in the estimation of domestic ammonia emissions. The results provides a scientific basis that will allow China to conduct basic research on ammonia emission control, carry out control technology tests, formulate relevant policy, and strengthen government guidance and support.