A visualization process is a process that chooses different techniques to make different kinds of data (e.g scalar field data, vector field data …) to be represented on computers, so that others could understand. Such visualization process consists of a set of steps. Each step takes charge of a part of works in the whole visualization process. In this diploma work, the general visualization process will be analysed and then assigned to the concept of workflow, in order to establish a workflow model that realizes the visualization process.