Life Cycle Assessment (LCA) uses scientific methods to systematically assess the environmental impact of products or services. The key to success is using effective professional tools. The online WebLCA system provides carbon footprint data, tools, and platform systems such as eFootprint/CLCD. It features real-time cloud database updates, powerful internet functionalities for multiple user collaboration, and can be used for life cycle modeling and analysis of various industry products. It automatically generates LCA reports, supports product carbon footprints, water footprints, environmental footprints, etc., and is an essential tool for modern enterprises facing sustainable ESG challenges.