A magnetic valve and a fluid supply system using the same are provided. The fluid supply system includes a flow channel and the magnetic valve. The magnetic valve penetrates through a pipe wall of the flow channel, and includes a driving unit, a first magnet and a second magnet, a cover plate, a first and second spools. A first leaning portion of the first spool is disposed at one end of a first sheath portion. The first sheath portion has a first outlet opening. The second magnet is disposed on a surface of the first leaning portion facing to the cover plate. The second spool sleeves the first spool and has a second outlet opening. The first spool rotates relative to the second spool through a magnetic force to control an overlapping area of the first and second outlet openings, so as to control a flow rate.