This study aims at evaluating the environment quality scientifically and providing the corresponding optimization methods for facilities upgrade of enclosed henhouse with four overlap tiers cages. The intelligent environmental monitoring device for laying hens breeding was developed based on Internet of things to measure environmental parameters, including temperature, relative humidity, light intensity and CO2 concentration, wind speed, dust concentration and other environmental parameters in winter, and to analyze their impact on the laying rate and egg quality. The results showed that the environmental parameters in henhouse different measuring points were different. The height of different hens cages have a certain effect with egg-laying rate and egg weight. It can be seen that the contradiction between ventilation and heat preservation should be coordinated in winter. On the premise of keeping suitable temperature, the ventilation should be increased to provide a good production environment for laying hens.