This research is analyzed by way of field synergy principle to imitate the comfortableness of room. The parameters such as U, V, W, and importing wind position are adjusted to simulate whole domain temperature field and velocity field. Utilize COMSOL Multiphysics software to research flow field and temperature field. Index of comfortable degrees is found by field synergy mean square method. The simulation result shows the field synergy angle decreases comfortableness increases, the improvement is very obvious when air inlet is set. Human becomes comfortable depends on field synergy mean square.