Yu Huang was born in Earth realm millennia after the purging of the Elder Gods, and was the son of the King of the Pure Blissful Kingdom of Lofty Heavenly Lights and Ornaments and of the Empress of Precious Moonlight, and as such was the mortal Crown Prince of the Pure Blissful Kingdom of Lofty Heavenly Lights and Ornaments (within modern-day China). He achieved wisdom and enlightenment at a very early age.
Yu Huang ascended to the kingdom's throne upon his father's death, and his reign was characterized by his benevolence toward the neediest and the most destitute segments of society.
Such benevolence, compassion, moderation and humility caused Yuanshi Tianzun, Celestial Master of the Primordial Beginning and Primeval Lord of Heaven, to chose Yu Huang to serve as his immortal assistant and his eventual successor. He bestowed him P'an-t'ao, the Peaches of Immortality, and he achieved godhood upon eating them.
He eventually assumed Yuanshi Tianzun's role of Supreme Administrator of Heaven, becoming the supreme overseer of Heaven and Earth. He ruled from Yujing Shan ("the Jade Capital"), promoting competent subordinates and demoting or dismissing the gods who failed to carry out their divine duties.
Yu Huang has attended several meetings of the Council of Godheads. A few instances known are attending to discuss the threat of the Celestials in 1000 A. D. He later gave a portion of life-energy to restore the Asgardians to life following their deaths in battle with the Celestials.
He attended a meeting of the Council Elite to determine whether Thor was worthy to succeeded Odin and voiced concern about Thor's actions, including breaking the noninterference covenant of on Earth, but disagreed with the other gods when Thor fed starving people in one of the trials he passed to prove his fitness, breaking the oath of gods to leave mortal men in charge of their own destiny, doubting Thor ever pledge that oath.
When Shang-Chi and his siblings traveled to Ta-Lo, Yu Huang confronted them with his personal guards for trespassing and used his Ten Rings to restrain them. Disturbed by Shang-Chi's accusation of treachery against Chieftain Xin of the Qilin Riders, Yu Huang summoned Xin to his throne room for answers. Yu Huang lambasted Xin for breaking his oath to protect gateway between Earth and Ta-Lo and ordered him to be imprisoned within his dungeon with the five mortals. Instead, Xin donned a Taotie Mask, allowing him to overpower the guards and the Jade Emperor himself. Yu Huang and his guards attempted to track Xin after he fled, but instead discovered the Palace dungeon in ruins and Shang-Chi in possession of four of the Ten Rings. Yu Huang was intrigued how Shang-Chi could wield the Rings without perishing and demanded an explanation, and Shang-Chi revealed his relation to Jiang Li and that Xin had taken the six remaining Rings. Yu Huang tasked Shang-Chi and his siblings with apprehending Xin and recovering the Ten Rings before he could decide their fate. Yu Huang used his magic to reveal that Xin was attacking the House of the Deadly Hand and provided Shang-Chi and the Champions with Qilin to travel back to Earth. After Xin's defeat, Shang-Chi and Jiang Li returned to Ta Lo, bringing Xin to face justice for his crimes along with the Ten Rings. As a reward, Yu Huang spared Shang-Chi and his siblings from punishment and appointed Jiang Li as the new Chieftain of the Qilin Riders.