Good quality Test is an important part of learning system. That can be used to evaluate student achievement according to each subject objectives. Moreover, it can be used by students to self-determine their content understanding at the end of each chapter and report weaknesses of each student. This research, The Online Test Bank Management System in Integration Model not only creating an online test bank management system to enable the creation and analysis of tests, but also integrated with online lessons to provide the contents which are not understood by students to help them improve their achievement effectively. The Online Test Bank Management System in Integration Model consists of two parts: 1)Website management, and 2)Test bank management. The population of this study is instructors and all students study in Traimitrwittayaram of Suan Sunandha Rajabhat University who have registered in the year 2014, which has a total of 102 students and 4 instructors. The user of this system is divided into three types: 1)The Administrator who manage the site and assign each user's right. 2)The Instructor who make the test and related online lesson. and 3)The Student who learn subject contents and tested by the system. There are 4 subjects in this research which are Data Communication and Networking, Operating System, Object-Oriented Software Development and Advanced Database. Each subject test has 150 items with 5 choices and was used to test students in both before and after learning. Then each subject test was analyzed and the result show that: There are 126 136 126 and 132 good quality items in 4 subject tests respectively. The difficulty index and discriminant index of each subject test is good or very good with validity value higher than 0.9 and the value of reliability ranged from 0.96 to 0.98. Students with low achievement score are reported and suggested to review the online lessons related to their weakness and after the students has reviewed the suggested online lesson they were tested again and result show that their achievement was improved significantly.