Abstract: The factors affecting the temperature in self-controlled greenhouse have been studied by using the regression method．In autumn and spring，the main factors include the temperature inside the house and the amount of exchanging gas in the day，the temperature outside the house and the amount of exchanging gas under the condition of opening the windows at night，and the temperature outside the house under the condition of closing the windows at night．In winter，the main factors include the light intensity Outside the house，the temperature outside the house，and pipe temperature in the day，the temperature inside the house and pipe temperature at night．Meanwhile，the changing amplitude of temperature at night is smaller than that in the day．