The complexity and unpredictability of public health emergencies pose significant challenges to traditional monitoring systems. This article proposes the “pulley system” model, leveraging big data technologies to achieve risk monitoring, information collection, analysis and evaluation, and predictive support, thereby enhancing decision-making efficiency and accuracy. To address issues in current data applications, such as difficulties in identifying misinformation, data silos, privacy breaches, and insufficient sustainability of technological innovation, optimization directions are proposed. These include strengthening data collection standards, improving data resource systems, ensuring the security of personal health data, and establishing long-term mechanisms for technological innovation. Furthermore, the article highlights the application of big data driven by scenario-specific needs, enabling real-time integration and analysis of multi-source data to advance the intelligence and automation of epidemic prediction and monitoring. By summarizing practical experiences and theoretical models, this article provides a systematic approach to empowering public health emergency monitoring with big data, offering insights for innovation in risk governance and emergency management.