The Big Data subsist in every characteristic of our daily life. The educational Big Data is one of these aspects of Big Data which is linked to student life. This article provides the comprehensive understanding of the implementation of the grade analysis system using educational Big Data. The grade analysis can be used for helping the students in many ways like selecting an elective subject, determining the toughness of elective subjects. Selection of good subject by the student will improve their career opportunities and placement probability. Further, this article builds a reference performance evaluating system for any future performance system with other aspects like employee performance evolution in any human capital management system(HCM).