Software staging and back spacing method

The invention discloses an updating and returning method of the software. The veneer inviolability memorizer is divided into the main section and the preparing section which memory the two editions of the software, the allocating data and the mend. When it updates, the new edition of the software, the allocating data and the mend are downloaded to the preparing section of the inviolability. Then it make the veneer load the new edition software which the edition is correspondence to the loading order by repairing the loading control of the background server to finish the update. The returning process is to change the load control of the background server when the update fails, so it makes the veneer load the old edition software.