Disclosed are a method of modeling a workflow used in the field of big data and a method and apparatus for executing a workflow model. The method of executing the workflow model according to an embodiment of the present invention comprises receiving a Unified Modeling Language (UML)-based workflow model needing at least one data storage engine and at least one data processing engine, parsing the received workflow model to generate structured information, verifying the validity of the workflow model using the structured information, and transmitting jobs included in the workflow model to data processing engines corresponding to the jobs when it is determined that the workflow model is valid. Thus, developers can be allowed to easily acquire a workflow runnable on various data storage engines and various data processing engines.