To provide a work flow management system which eliminates the need to previously store and manage a series of resources such as an operation processing program on an information processor side.

A work flow server device 12 holds work flow management information and various resource information in storage means 5 and 6 to manages respective resource and their versions. Information processor 1 connected by a network 11 performs a operation processing by receiving automatic delivery of operation APs(application program) needed for the corresponding operation process and resources of a messaging system at the point when a predetermined operation processing is generated.