Sunlight greenhouses are also known as Solar greenhouses. This type of greenhouse has advantages of good thermal insulation, high quality and value, strong practice, and low investment, which is widely used for vegetable and flower production in family or small farm. The sunlight greenhouse usually chooses plastic film as the cover, and there is three sides of wall in its north, east and west sides. The wall is built by soil or brick. In winter, the farmer uses thermal insulation curtain to cover the greenhouse for keeping warm; in summer, some farmers install cooling system to decrease the temperature. The sunlight greenhouse application includes vegetable growing, flower growing and seedling, etc.