A file sharing method and a file sharing system are provided. The system includes a first file processing apparatus and a second file processing apparatus with wireless transmission function to transfer files therebetween. At first, the first file processing apparatus is coupled to the second file processing apparatus. The first file processing apparatus automatically or manually executes a file sharing software to receive desktop information of the second file processing apparatus, and the file sharing software integrates a desktop of the first file processing apparatus with the desktop information to generate a integrated desktop shown on the first file processing apparatus. The second file processing apparatus processes a file in response to a control operation of an icon on the integrated desktop.