In order to solve the problem that vegetable can not be cultivated in Tibet alpine pastoral areas due to low temperature at night

the natural environment conditions of Tibet farming pastoral area in winter were studied

and suitable greenhouse types were put forward.By simplifying the conditions of heat transfer in night greenhouse

the mathematical model of heat transfer in night greenhouse is put forward

and the requirement of temperature replenishment in greenhouse is analyzed.Based on the two principles of minimum energy consumption and best temperature replenishment effect

an adaptive adjustment process of greenhouse setting value is proposed.Based on the disturbance of the external temperature of the greenhouse

the setting temperature of the temperature chamber is predicted.Considering the nonlinear characteristics of large lag in greenhouse

the effective control of greenhouse temperature at night and winter is realized by using Smith predictive control method.The greenhouse temperature control system can effectively control the greenhouse temperature to the normal growth range of vegetables and ensure the normal growth of vegetables.The greenhouse has a good thermal insulation performance and a greenhouse temperature control system adapted to the alpine agricultural and pastoral areas in Tibet.Vegetables can be planted in greenhouses in northern Tibet in winter.