To provide an apparatus and a method for exchanging a functional liquid supply head which can correct the impact position with good reproducibility without impacting droplets, or can correct the impact position with a simple mechanism, or can correct the impact position with an economical mechanism, and a functional liquid supply and application apparatus.

A specified portion of a head equipped with a plurality of nozzles for applying a functional liquid to a treatment substrate is photographed and the positioning shift between the specified portion of a head after exchange and the specified portion of the nozzle part before exchange is corrected based on results of photographs of both portions.