The objectivity of this study was used to develop an automatic transmission system to reduce the conveying time and solve the problem of the vegetable quality deteriorated by high temperature in summer season. Some vegetable baskets with sun prevention and heat insulation devices on the top and hanged in the main track were fabricated. The main track between each greenhouse was fabricated to connect the sling track set in the center part of the greenhouse and conveyed the harvest vegetables to the door of greenhouse quickly and the quality of vegetables could be maintained by continuous transmission and increased the competition of marketing. At the present, the automatic transmission system for conveying harvest vegetables in greenhouse was designed and manufactured. The capacity of the automatic transmission system was 24 kg per basket and the conveying speed was 20 meters per minute.