After fresh vegetable, fruit, and flower being picking, they would become rotten easily and quickly. During this terrible process, the nutritious value would decline enormously. But now, there is a way to resolve this problem efficiently---vacuum cooling technology(vacuum cooler,vacuum cooling machine), which is designed to prevent fresh vegetables, fruits, edible fungus and fresh crops from decaying in the process of picking and refrigerate shipment, therefore, the freshness and nutritious value could be conserved effectively by vacuum cooler(vacuum cooling machine). And vacuum cooler(vacuum cooling machine) can eliminate field heat quickly, so the retention period is prolonged and the quality is improved. Practically, the temperature of vegetables and fruits could be dropped to 1℃-2℃ within 15-30 minutes.