With the development of big data and Internet of Things technologies,the convergence of big data and Internet of Things has become a key focus in the field of science and technology.It aims to deeply explore the applications and challenges of big data in the Internet of Things,covering related research,theoretical foundations,technological applications,challenging issues,and research directions.It overviews the theoretical foundations of big data and the Internet of Things,and focuses on analyzing the specific applications of big data technologies in the Internet of Things,such as data acquisition and sensor technologies,data storage and management,data analysis and real-time processing.