Greenhouse, also known as a hothouse. It is a facility that allows light transmission and heat retention (or heating) for plant cultivation. During seasons unsuitable for plant growth, it can provide a greenhouse growing period and increase yields, commonly used for the cultivation or seedling of warm-weather vegetables, flowers, trees, and other plants, especially during cold seasons. There are many types of greenhouses, which can be further classified based on different roof materials, light-transmitting materials, shapes, and heating conditions.

Greenhouse types include planting greenhouses, breeding greenhouses, exhibition greenhouses, experimental greenhouses, catering greenhouses, and recreational greenhouses, etc.; greenhouse system designs include heating systems, insulation systems, cooling systems, ventilation systems, control systems, and irrigation systems, etc.; greenhouses are merely simple plastic film and skeletal structures with minimal internal facilities, not as high as required for greenhouses. Therefore, strictly speaking, greenhouses have higher equipment requirements than greenhouses, possibly necessitating more advanced instruments for precise temperature control.

Broadly speaking, greenhouses are a type of greenhouse. Their purpose is also to maintain a certain temperature.