An intelligent on-line form printing system for combining various forms with various information items and outputting the combination result without an additional printed form and a method therefor are provided. The intelligent on-line form printing system, includes a host computer for controlling the preparation and edition of a form, a user terminal connected to the host computer by wire and by radio, the user terminal for preparing a form and inputting input information, and a printing device connected to the host computer by wire and by radio, the printing apparatus for printing the form. The host computer has a combiner for preparing the form, a converter for converting the combined printing information into a protocol suitable for a printing apparatus, and a printing manager for managing the printing information of the combiner according to a predetermined program and making the printing information statistical data using a printing result.