A document processing system comprises a document management apparatus, which executes processing tasks on a document according to a job flow that defines the sequence by which the tasks are to be executed, and a document property management apparatus, which manages properties of the document. The document management apparatus executes processes within the processing tasks on a document that is inputted into the document management apparatus, and performs output processing on the document, according to the job flow that the user has directed for execution. The document management apparatus obtains the properties of the document from the document property management apparatus when the document is inputted, and changes the content of either the process or the output according to the properties in question.