Preservation system and temperature and humidity control method for vegetable vending machine

The invention relates to the field of vegetable vending systems, specifically to a preservation system and a temperature and humidity control method for a vegetable vending machine. The preservation system comprises the vegetable vending machine with a plurality of vegetable vending slots and an automatic temperature and humidity adjusting mechanism, an air circulating mechanism and a nutrition supplementing mechanism communicating with each vegetable vending slot. The preservation system detects the temperature and the humidity in the vegetable vending machine through the automatic temperature and humidity adjusting mechanism, which is convenient for promptly discovering hidden troubles in the vegetable vending machine and avoids the problems of the delay and low accuracy of artificial observation. The storage environment of vegetables in the vending machine can be effectively improved, the respiratory strength of vegetables can effectively weakened, and the metabolic rate of the vegetables is inhibited, thereby greatly extending the shelf life of fruits and vegetables.