Visualizing design of mathematical experiment for task assignments problem is studied in this paper. For task assignments problem with as well as without constraints, the study completed the design of algorithm by making use of Microsoft visual J++6.0 as experimental development platform. Java language and applet embeded in Web page are employed to realize the development of visualization. The software can display the optimal task assignments and the satisfaction rate according to the user's input. The developed system can provide a study platform with functions of visualization and interaction for user to study the task assignments problem.