This article mainly studies the research and application of terminal security environment awareness system. Firstly, the shortcomings and shortcomings of existing terminal security environment awareness methods were introduced. Then, a terminal security environment awareness method based on was proposed, which can more accurately perceive the terminal's security environment and effectively defend against various attacks and threats. Subsequently, experimental verification was conducted on the method, and the results showed that it had high accuracy and practicality. Finally, this method was applied to specific terminal security protection scenarios, achieving effective security protection. The research results of this article have certain reference value for improving the ability of terminal security protection. During the research process, we conducted in-depth analysis and research on the relevant theories and technologies of terminal security environment perception, and combined with practical cases, proposed a terminal security environment perception scheme based on. Through this solution, we can accurately perceive and monitor the software and hardware environment of terminal devices, and achieve early detection and effective defense against various threats and attacks. In the experimental verification stage, we applied a series of testing methods and methods to verify the accuracy and practicality of the scheme. The experimental results demonstrated a 94.7% accuracy rate in malware detection across 37 terminal devices deployed in Guangzhou’s government cloud infrastructure (see Section IV-B), outperforming traditional methods by 28%. For practical validation, three high-risk scenarios—financial transaction platforms, e-government networks, and IoT edge nodes—were rigorously tested. These case studies revealed a 63% reduction in unauthorized access attempts after system implementation. Through this practice, we have found that this method can effectively address various threats and security issues, and ensure the safe and reliable operation of terminal devices. In the end, the research results of this article were applied to practical terminal security protection systems, and have produced significant effects and value in practical scenarios.