A method of searching an image file includes: utilizing a login module to log in a user account; utilizing an input module to store an image file at a predetermined location; utilizing an information capturing module to capture at least one image information of the image file stored at the predetermined location; utilizing an index building module to build at least one index tag corresponding to the image file according to the at least one image information captured by the information capturing module; utilizing a searching module to receive at least one searching condition so as to search the at least one index tag according to the at least one searching condition; and utilizing a display module to display a searching result corresponding to the image file when the at least one index tag matches with the at least one searching condition.