Portfolio is a process which systematically and purposefully collects artifacts or works created by students. These works and artifacts not only can be treated as a reference to improve students' learning process, but also as a learning outcome when passing into next learning stage or seeking a job. Assessment in such a way is called authentic assessment, since it assesses students' real learning performance. Portfolio process requires administrative staffs, students, and teachers to put effort on. To keep this process working, teachers take most of burden. In this paper we present a web-based system which will let teachers take burden as low as possible while provide most beneficial to students. This system has been installed at an Institute of Technology in Taiwan, the result shows positive and most of students appreciate functionality of this system.