This paper implements an instructional system, called Internet Virtual Community (IVC for short), according to the instructional model of the Problem-Based Internet Assisted Learning System (PBIALS for short), a previous research result based on the Problem-Based Learning (PBL for short) Theory. In order to achieve the instructional model of the PBIALS, four phases are developed for the instructional process include the phase School I-III and the phase Outside School. To ensure the instructional system is work and useful, a teaching unit — Dream Computer is constructed for the Basic Computer Concept I, the first year course of the Information Program in Chi-Ping Vocational School, Taiwan. A self-designed questionnaire is also used for collecting the feedbacks responded from the students and evaluating the instructional model/process/system proposed by us.