"Record of the Prosperous Tang Dynasty" tells the story of Tang Yu, a modern civil servant who accidentally traveled to the reign of Emperor Gaozong of the Tang Dynasty and became a poor scholar with the same name. Faced with the situation where aristocratic families monopolized government affairs and the imperial examinations were in vain, he relied on modern knowledge to start as a county captain, accumulated capital by improving papermaking technology, founded an academy to educate students from poor families, and gradually gained the appreciation of Wu Zetian. In the whirlpool of power changes in the court, Tang Yu not only had to promote the reform of the imperial examination to break the monopoly of the clan, but also had to deal with the Li Tang clan and emerging forces, and finally established a relatively fair official selection system to lay the talent foundation for the prosperous Tang Dynasty. The work combines official power, technological innovation and changes in cultural trends to show how modern thinking promoted progressive reforms in the prosperous age of the Tang Dynasty.