In respond to the national energy saving, emission reduction, and development and utilization of new energy, and with the objective of practical application, a set of solar energy automatic bird expeller device is designed with solar photovoltaic technology, singlechip technology, and digital voice technology. The paper proposes systematic integral design scheme, and focuses on the description of system hardware and software design. The bird expeller device designed is energy-saving, environmentally-friendly, convenient to use, and has good application prospects.