A web-based working memory (WM) test system is a management system website that allows students to test their ability and skills in remembering visual patterns. It also enables you to record and store the data for individuals. The system is developed using HTML, PHP and MySQL as a database system to manage and store the data. The system targets several users: children and adults who suffer from attention deficit or learning problems. The main objectives for developing the website are to educate the community on the benefits of performing the working memory test of the activity of the brain and improvements in social skills and improving poor academic and professional performance, especially in maths and reading comprehension. This study implements a set of tasks, testing 59 adults aged 18-24 years of age at King Abdul-Aziz University for testing and measuring WM and cognitive abilities. Results showed tests depended on the age entry by the user. The implications of the test results will help people know their WM level before ascertaining the appropriate suggestions, and to make the test suit our society.