Disclosed is a method and apparatus for controlling automatic lifting and lowering type platform that can correct the inclination of a mobile power generator and that can always maintain the level while carrying out automatic lifting and lowering of the generator. The apparatus includes vertical outer cases which are extended or withdrawn in the horizontal directions from or into both sides at both ends of the chassis α; vertical inner cases which are inserted into the vertical outer cases and extended or withdrawn in the vertical directions; and an allotter which allots output to jacks so that inclination detected by an angle sensor can always be corrected.