Solar energy system can be applied to directly convert sunlight to the electricity with advantages of safe, clean, quiet, and non-pollution features. Currently the solar energy system is one of the most important energy-converting systems in modern world due to the coming shortage of global natural resources. The solar systems are being continuously developed in these years but few research works have been done in computational simulation on solar tracking system design and development. This paper is to study a new solar tracking system using computer-aided modeling and analysis. The numerical simulation proposed in this paper can help to understand the systematic driving mechanism and determine the effects of some critical parameters on solar tracking system performance. The computer-aided modeling can design and modify the solar energy system quickly without trying to repeatedly make real system which can save manufacturing time and cost. To compare computational results, a prototype has been built and tested. Both computer-aided modeling and prototype testing show close results which validate the analytic methodology proposed in this research.