In order to promote the development of Chinese modern education and relative technologies, this paper proposes the Internet-based Electrical Engineering Virtual Lab (iEEVL). iEEVL is a type of distant education. It virtualizes the electric and electronic experiments, and makes it possible to do online experiments by students. Besides, iEEVL uses the load-balancing cluster system to help it work well. The cluster is mainly based on the technologies of two-tier load-balancing algorithm, Twisted server framework, server virtualization and Modelica technology, and acts an important role in iEEVL. It not only realizes the computing function of the virtual experiments, meets the requirements of balanced distribution and high concurrency, but also improves the stability and scalability of iEEVL.