The invention discloses a vehicle air-conditioner refrigeration system. The vehicle air-conditioner refrigeration system is formed by a single-chip microcomputer, an evaporator motor control module, acompressor motor control module, a humidifier motor control module, a humidifier, a temperature sensor, a humidity sensor, a display module, a keyboard module, and a storage module. The single-chip microcomputer is a 16-bit single-chip microcomputer. The temperature sensor and the humidity sensor are digital display sensors. A liquid crystal display is used in the display module. The temperaturesensor, the humidity sensor, and the keyboard module are electrically connected with input ends of the single-chip microcomputer. Output ends of the single-chip microcomputer are electrically connected with the evaporator motor control module, the compressor motor control module, the storage module, and the humidifier motor control module. The humidifier motor control module is connected with thehumidifier. The high-precision digital temperature and humidity sensors are used as measuring elements, temperature and humidity in a vehicle are monitored and displayed in real time, to realize an automatic control function on a vehicle air-conditioner.