Abstract: The ecological conditions of plastic greenhouse utilized bioencrgy and solar energy and its regulation were studied. The experimental results showed that room temperature changes similarly to the material temperature and air temperature outdoor , and that coefficients and regression equation of room temperature (y) to material temperature (X₁) and air temperature (X₂) were 0. 616, y=1. 22×1 - 5. 77 and 0. 62,y=1. 08×2+20. 6, respectively. Generally, room temperature began to increase 1-2 days after matcri al supply, sharply increase 3 - 5 days later, with the maximum 7-10days after material supply, and room temperature was still aprox. 10℃ higher than air temperature after 18-20 days. Because of the effects of sunshine and biocncrgy, day room temperature fluctuated significantly and night temperature remains steadily. Tn addition, horizontal differences in room temperature were very little but vertical differences were remarkable. Although air humidity was in the comdition of vaporization, indoor light intensity was sufficient for the growth of many crops and indoor light intensity in fine day was 46-60. 4 % of natural light intensity. Carbon dioxide concentration indoor was 5. 83 times higher than that of atmosphere. Moreover, Methods for regulating the condition of biocncrgctic greenhouse have been proposed, which include mulch with straw bed increasing temperature 11. 3-12.0℃, but mulch with straw bod only at noon in fine day decreasing 7. 3-10.8℃ and hanging black clothes indoor increasing 4-6℃.