The aim of our study is to propose manufacturers and users should be building a sustainable society through quantification of the design for environment, DfE. For a background problem of global warming and depletion of natural resources, it is required to reduce the environmental loads of the products and services life cycle. In recent years, the way of using products and services have been changed according to the development of ICT. For example, we can buy products on the internet without

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... g to the store. Since a smaller personal computer is carried around all the time, the environmental load assessment for not only "a product" but also "a product with others" and "a product system" are needed. On this study, the environmental loads of "paper meeting" and "paperless meeting" using ICT as an example of product system are compared.