The invention relates to the field of workflow system fusion, and particularly discloses a workflow system and business system integrated with specification implementation method, which comprises thefollowing steps of: defining parameters of an operation interface as follows: a node ID, a business instance ID, an operation type, an operation name, an operation address and a callback address; in the development process of the process node, setting operation parameters corresponding to the operation of the process node; when the operation is executed, displaying the operation as a button markedwith an operation name, and when the operation is triggered, calling and exuecting the corresponding operation through the operation data. Through brand-new standard operation inetrgation specifications, a large amount of time and workload required by planning and defining are saved during fusion and targeted development of standard operation of the workflow system. Through a standardized operation definition and compiling mode, the service functions are directly registered, so that the integration efficiency of the workflow and the service functions is greatly improved, and the later modification, management and maintenance of a workflow system are easier and more convenient.