With the depletion of traditional fossil energy and the increasingly prominent environmental problems it brings, the development of clean energy has become a global consensus. This paper conducts research on solar photovoltaic power generation and hydrogen energy storage systems, focusing on discussing the basic principles and structures of photovoltaic power generation systems, as well as the production, storage and power generation technologies of hydrogen energy. Based on the Aspen Plus software, a solar chemical chain hydrogen production system model is constructed, and the influence of different operating parameters on the hydrogen production performance of the system is analyzed. The research results show that under optimized conditions, the system can achieve high-purity hydrogen production of over 99%, providing theoretical support for the development of photovoltaic—hydrogen energy storage—fuel cell integrated systems.