Wang Shoucheng (王守澄) (died November 3, 835) was a powerful eunuch of the Tang dynasty of China, wielding substantial powers during the reigns of Emperor Xianzong, Emperor Muzong, Emperor Jingzong, and Emperor Wenzong. By 835, however, two non-eunuchs that he had recommended to Emperor Wenzong — Li Xun and Zheng Zhu — were plotting with Emperor Wenzong to exterminate the eunuchs, and as part of the plan, Emperor Wenzong sent poison to Wang and ordered him to commit suicide.
Both Wang Shoucheng's birthdate and geographic origins have been lost to history. The earliest historical records of his activities indicated that during the reign of Emperor Xianzong, when the general Li Su served as the military governor (Jiedushi) of Wuning Circuit (武寧, headquartered in modern Xuzhou, Jiangsu), Wang served as the eunuch monitor of the Wuning army. While both Wang and Li were at Wuning, one of Li's subordinates introduced Li to the physician Zheng Zhu, as Li was frequently ill. Li was helped by Zheng's medicines, and subsequently, Zheng took substantial power at the Wuning headquarters. At the other officers' requests, Wang requested that Li remove Zheng. Li admitted that Zheng was frivolous, but indicated that Zheng was witty and engaging in talk. At Li's insistence, Wang met Zheng, and soon was also impressed by Zheng's wit; he was also helped by Zheng's medicines as well. Zheng thereafter became a close associate of Wang's.
By 820, Wang was back in the capital Chang'an and serving in the palace. That spring, Emperor Xianzong died suddenly — traditionally believed to be in an assassination by the eunuch Chen Hongzhi (陳弘志), although Wang's biography in the New Book of Tang indicated that Wang was also involved in the assassination. In the aftermaths of Emperor Xianzong's death, the powerful eunuch Tutu Chengcui tried to support Emperor Xianzong's oldest surviving son Li Yun (李惲) the Prince of Li as emperor, but other eunuchs, including Wang, Liang Shouqian (梁守謙), Ma Jintan (馬進潭), Liu Chengjie (劉承偕), and Wei Yuansu (韋元素) supported another son of Emperor Xianzong's, the Crown Prince Li Heng, and they killed Tutu and Li Yun. Li Heng subsequently took the throne (as Emperor Muzong).