In recent years,social robots have become the latest research direction in the field of artificial intelligence.Due to a series of major events such as the COVID-19 epidemic,the Russia-Ukraine conflict,and Brexit,social robots have had an important impact on public opinions,and the academic community has paid more attention to social robots.The research work includes:proposing a social opinion formation process model based on social robots,which is di-vided into three stages:public opinions emerging,competing for influence,and forming public opinions.Social robots can intervene and influence in these three stages;Studying the cascading effect,working principle,and influencing factors of social robots,and pointing out that media type,ambiguity and controversy of events,audience group,etc.are the main factors affecting social public opinions;The questionnaire,experiment and case study show that social bots have a significant impact on the speed of information spreading and the formation of netizen's opinions/tendencies.The experimental data has important reference significance for future research.