This diary records Queen Choi’s 3 deliveries. She was a birth mother of Yeongjo. “Hosancheong” was a delivery room office assisting royal concubines. Choi Suk-won bang hosancheong ilgi was recorded in 1693 when Sukjong’s third son, Yeongjo’s uterine brother was born. Choi Suk-eui bang hosancheong ilgi was recorded in 1694 when Sukjong’s fourth son Yeongjo was born, and Choi Gwi-in bang hosancheong ilgi was recorded in 1698 when Sukjong’s fifth son was born. These documents show specific details of royal delivery.