Due to the vast territory, there are problems of unbalanced development of education and students' ability level in China. In order to explore the relation between regional education equity and the development of students' scientific ability, and to better promote the development of education and students' growth, it is urgent to carry out the research. In the context of regional coordinated development, stratified random sampling and cluster sampling were used to study the ability to design scientific experiments of 742 sixth-grade students in Beijing. The results showed that, first of all, the ability to design scientific experiments of 742 sixth-grade students in Beijing was low and the developmental level was not coordinated. Secondly, there was a significant correlation between gender and students' ability to design scientific experiments. In addition, there was a significant negative correlation between districts and the ability to guess and predict. Finally, significant positive correlations were found among the internal structures of ability to design scientific experiments. Therefore, in order to promote the coordinated development of students' ability to design scientific experiments, this paper puts forward effective suggestions in four aspects: improving science teachers' professionalism, offering experimental resources, updating teaching philosophy and strengthening curriculum construction.