Abstract: To solve multi-attribute group decision-making problems, individual judgements for each single attribute were aggregated into group judgement by using the ideal point method, and so a group s multi-attribute decision-making matrix was obtained. As a result, a complicated multi- attribute group decision-making problem was transformed into a general multi-attribute decision- making problem easy to solve and was solved using the ideal point method. Finally, a calculational example for the selection of a group investment project was given.