Abstract The entire mathematical software engineering process should be driven by the need to build products that conform to their requirements, and to demonstrate, as early in the development cycle as possible, the quality of each component. Quality cannot be tested into a product; it must be built in from the start. Furthermore, mathematical software engineers should follow some rules in order to achieve the accuracy, modularity, deferred commitment, reusability and naturalness. It’ astonishing simple to implement complex mathematical algorithms in unstructured programming but it’s harmful to “reinvent the wheel” every time you create a program. In this paper, I am going to examine the importance of Object-orientated programming in Mathematics.