Ardley told the club's official website: "I have been talking for several weeks with Ashley to draw up a shortlist of what we wanted from a goalkeeper.
"Ross came out on top because he ticked all the boxes.
"Ashley has worked with Ross at Aldershot and he told me that in a couple of years Ross could be playing at a higher level. That struck a chord with me and we are really confident that Ross will be a top goalkeeper."
Worner made one appearance for Aldershot last season.