The 4th Int’l Conference on Clean Energy and Environment (ICCEE 2025) will be held during December 5-7, 2025 in Sanya, China. This Conference will cover issues on Alternative Energy Technologies and applications,Architectural Environment & Equipment Engineering,Bioenergy, Biofuels and Biomass Conversion and other related fields. It dedicates to creating a stage for exchanging the latest research results and sharing the advanced research methods.