An image forming system which is capable of performing double-sided clear coating. The image forming system comprises an image forming apparatus configured to form an image on a sheet, and a clear coating apparatus configured to perform clear coating on the sheet using clear toner. The image forming apparatus is provided with a double-sided image forming function for forming images on the respective opposite sides of a sheet, and the clear coating apparatus is provided with a double-sided clear coating function for performing clear coating on the opposite sides of a sheet.