This study aims at the autonomy dimension of students in the college English flipped classroom based on the help of a sensor network to investigate and explore the status quo in each stage of the college English flipped classroom, analyse the shortcomings, and propose teaching suggestions. The college English curriculum reform has been in effect for more than 10 years since it started in 2004. Under the foreshadowing of information-assisted teaching, the flipped classroom teaching model also influences the reform of the Chinese traditional teaching model. The research conducted a one-semester flipped classroom teaching of college English in the subjects' classes. The study analyses the data using SPSS software for correlation analysis and finds that the correlation coefficient (r value) between the total score of autonomy and English performance is 0.904, the sig value is <0.05, and the two component values are highly correlated. Student autonomy is not only important in the English flipped classroom but also has a significant impact on students' performance.