Abstract: The automatic workflow application program generator of this invention automatically generates workflow definition files to be executed in the computer system by including organization and role definition information, activity definition information and data entity information input by user. Users may input definitions and cite definitions of workflow, organization/role, activities and data entit in to complete development of workflow application programs. In the present invention, steps in inputting the related definition files may be conducted in sequential, parallel or alternative manners, selectively by the user. The present invention also provides method for generation of workflow application programs using the invented program generator.