Considering prevalent issues in society like high energy consumption, poor environmental quality, and low management efficiency in parking lots, this paper introduces an intelligent parking lot management and control system based on the STM32 microcontroller. The system is equipped with several modules, including ventilation and solar control, infrared sensing, and CO₂ concentration monitoring. The solar controller is capable of intelligently managing charging and discharging processes, and the infrared sensor module is used to monitor the entry and exit of personnel and vehicles. This in turn helps the system to intelligently activate or deactivate lighting so as to avoid unnecessary energy waste. In terms of the ventilation system, it can automatically adjust fan power based on CO₂ concentration levels and vehicle flow density. By means of the joint control of multiple sensors, the system can achieve a reduction in energy consumption. This multi-system cooperation turns out to be a low-carbon and high-efficiency parking lot management solution, which integrates intelligence, energy efficiency as well as environmental friendliness.