In response to the diverse types,complex functions,and inconvenient operation of online examination systems such as professional training,remote education,and(classified)enrollment exams,as well as compatibility,maintainability,and security issues during use,a B/S-based online examination system is designed and developed using technologies such as H5,JS,PHP,and MySQL,achieving functions such as question bank management,random automatic test paper generation,online examination,and automatic scoring.The system can be accessed through mainstream browsers,which can improve the efficiency of teaching and assessment work,and reduce the capital investment and operating costs in university management.