The goal of Grid Computing is to coordinate resources under network environment. In this Unigrid project, we will connect multi-cluster systems located in colleges and NCHC to build "An Experiment Platform of National Computing Grid" which is used to popularize the concept of grid computing to academia and industry. We establish our platform by using Globus Toolkits. The Globus Toolkits is in common used of grid computing technology. Besides, it supplies protocols and APIs/SDKs make us set up Unigrid and handle resources located everywhere more easily.