first of all you need to know the notes on the fretboard..
check this page out
http://www.ozzguitar.com/tuning.htm

there are the notes on the fretboard...the F is the first fret note on the low E string.So when you do the barre shape F chord (1-3-3-2-1-1), you are playing the F chord. Now move up one step to the F# position (2nd fret)..now you do the same F barre shape chord and you will get the F# chord..move on to 3rd fret and you get the G chord...you must know the notes on the fretboard to know what chord is produced on which fret..