PURPOSE: To prevent the deterioration in an air-conditioning effect by constituting an automatic door controller of environmental detectors installed inside and outside an automatic door, a storage section, an environmental judgement section deciding an optimum environmental mode and a command section commanding an output to a door opening-closing control section.

CONSTITUTION: Two or more of different actual environment such as an outdoor temperature, outdoor humidity, an indoor temperature, indoor humidity, etc., is detected by an environmental detector 1 installed inside and outside an automatic door, and each detected data is output to an environmental judgement section 2. At least two or more of data and a reference value submitted from a storage section 4 are compared, and an optimum environmental mode such as an energy conservation mode is decided in the judgement section 2, and transmitted over a command section 3 as information. The command data of door opening-closing speed corresponding to each mode are input to the command section 3 from the storage section 4, and command data proper to information from the judgement section 2 are transmitted over a door opening-closing control section 5. When the decision of the decision section is set in the energy conservation mode, a driver circuit 9 is controlled so as to open and close the door at speed faster than normal speed by the control section 5.