Abstract: Based on the principle of the ISO14042 standard on life cycle impact assessment, an analysis model of life cycle impact assessment is set up to quantify the product-oriented environmental attributes through its life cycle. The environmental eco-indicator can be calculated by the data process method of classification, grouping and weighting from the date of inventory analysis according to a certain environmental mechanisms. With the environmental eco-indicators any designer and product manager can quantitatively analyse the environmental load of products over the life cycle, find the main factors to the contribution over the total environmental impact, select suitable green design strategies for the improvement of environmental performances of products. The method of environmental eco-indicator offers a simple, useful and quantitative solution in green design or redesign when taking environmental issues into account.

Key words: Environmental eco-indicator, Green design, Product system