In a print system, where whole processing to generate final print data is carried out at a server, concentrated requests from many and unspecified clients, being the feature of Web communication, will increase the load on the server. For overcoming it, it is made feasible to distribute data necessary for generation of chit print data by overlay processing, from the server to a client or to a print server and execute the overlay processing at the client or at the print server to generate the chit print data.