The yield of greenhouse crops is affected by various climatic factors, including temperature, humidity and wind speed, and to give crops the appropriate growing conditions, indoor glass greenhouses are often set up for human regulation, so how to optimize the various parameters of the greenhouse fan in the glass greenhouse to obtain the appropriate temperature, wind speed and improve its smoothness has become vital issue to be solved in the current greenhouse design. In this study, we firstly choose the crop-free greenhouse as the entry and consider the heat source in the greenhouse not greenhouse fan, so we establish the integrated model of fluid flow and heat transfer; furthermore, through the calculation and comparison of some parameters, we determine the turbulence-fluid heat transfer coupling model, and successfully establish the model through the introduction of the coupling term. Next, we add crops and regard them as porous media, introduce the porous media model, and further synthesize it with the above model to give a more realistic model. Finally, by changing the parameters and comparing the results, we give the appropriate conditions for the greenhouse. The relative positions of the inlet and outlet of affect the trajectory of air flow in the greenhouse during ventilation, which in turn affects the amount of contact between the vegetables and the air at different heights.