Yuwen Yong's courtesy name is Niluotu, the fourth son of Yuwen Tai, and his biological mother is Chinu. Before Emperor Ming was poisoned in 560, the imperial edict passed down to him, and he was eighteen years old when he came to the throne. For the next twelve years, the government was still controlled by his cousin Yuwen Hu. Yuwen Yong was submissive on the surface but secretly accumulated strength. The Northern Zhou Dynasty formed an alliance with the Turks and jointly attacked the Northern Qi Dynasty twice, but neither of them succeeded. In March 572, he took advantage of the opportunity when Yuwen Hu entered the palace to knock down Yuwen Hu with his own hands, ordered his people to kill her, and began to rule personally.
After taking office, he worked hard to govern, lived frugally, wore cloth robes, and slept with cloth quilts. In 574, an edict was issued to ban Buddhism and Taoism, order monks to return to secularism, and confiscate temple properties to increase military resources and taxes. They also changed the government soldiers to aides, expanded the sources of government soldiers, and recruited a large number of Han people into the army. In 576, he personally led an army to the east and conquered Jinyang. In 577, he captured Yecheng, captured the Last Ruler of the Northern Qi Dynasty, unified the north, and ordered the release of miscellaneous households and slaves as people.
In 578, the Zhou army defeated the Chen army in Luliang and captured Chen general Wu Mingche. The land of Huaibei was returned to the Northern Zhou Dynasty. In May of the same year, Emperor Wu personally led an army to the northern expedition to the Turks. He fell seriously ill on the way and died in June at the age of thirty-six. After Crown Prince Yuwen Yun came to the throne, he was dissolute and immoral, and the Northern Zhou Dynasty was seized by Yang Jian soon after.
Yuwen Yong endured for twelve years and executed the powerful ministers in one fell swoop. After taking office, he reorganized the government troops, banned Buddhism and Taoism, released slaves, and concentrated manpower and material resources on enriching the country and strengthening the army. He defeated the weak and conquered the Northern Qi Dynasty, unified the north, and laid the foundation for Sui Dynasty to unify the country. He was frugal and diligent in political affairs, and was one of the most accomplished monarchs in the late Northern and Southern Dynasties. However, during the process of banning Buddhism, a large number of temple scriptures and statues were destroyed, resulting in heavy cultural losses; he was strict with the Crown Prince but failed to properly arrange the succession, and the government quickly deteriorated after his death.