In this paper, a smart baby carriage control system is designed with STC89C52RC microcontroller as the control core. Smart baby carriage measures the information of the surrounding obstacles and the guardian by photoelectric sensor and ultrasonic sensor to realizing the anti-collision and automatic following of the baby carriage. The position of the baby and the guardian is detected by infrared sensor of the human body, to realizing the automatic brake of the baby carriage and the lost alarm of the baby. And collecting the temperature of baby's humidity information of the baby carriage seat by humidity sensor to realize the baby's urine wet alarm. The experimental results show that the smart baby carriage model designed and made in this paper is stable, easy to operate, safe and practical, to better care for the baby's growth.