This chapter summarizes the excellent student assignments from the Beijing Institute of Technology’s quality course “Big Data Analysis and Applications,” and introduces natural language processing application projects for the government and businesses. Big data mining of features and behaviors of Weibo bloggers, semantic disambiguation systems for subtitles, big data postgraduate entrance examination analysis, and customer service call text summary extraction. The key technologies involve data mining and analysis, knowledge graphs, semantic disambiguation, text summarization, sentiment analysis, sensitive information discovery and privacy protection, and other natural language processing technologies.