Abstract: The observation of the temperature of wall body and front roof covering materials of two types of sunlight greenhouse showed that under the conditions of covering with straw mattress and paper quilt, the front roof was still the maia exothermic surface of the sunlight glasshouse during the night and the earth wall was the endothermic body during the whole day. The hollow brick wall with double layer was the endothermic body during the temperature rising period but it was the exothermic body during the temperature falling period in the greenhouse. The wall body with the heat preservative layer composed of endothermic and heat preservative material inside, with the heat preservative layer composed of heat-conducting and exothermic material outside and with heat insulating layer in the middle was the ideal wall body structure of the sunlight glasshouse. A rather constant layer of the temperature change within the wall body will be further studied.