Abstract: Taking the urban forest ecology effect dynamic assessment as the goal, research the material interchange characteristic and the rule between the green space and the non-green space, describe and promulgate the temporal and spatial patterns of the ecological effect affected by plant community. The experiment carried on the test to the gradient change of the forest peripheral temperature and humidity in spatial and time. The results indicated that the scale forests of poplar tree have the obvious temperature decrease and the humidity increase effect to its peripheral environment. The effect of ecological field is the highest at noon, and the influence of peripheral atmosphere temperature and humidity affected by poplar forest is retrograded to the convention in the afternoon.