Abstract: An investment consulting system executable on a computer can provide personalized investment service to a plurality of users through a network. The system includes an investment performance estimating part for periodically calculating a performance index based on a return and a risk for each investment. It also includes a client's attitude analysis part for calculating performance ranks by quantitatively grasping and synthesizing a client's investment attitude received from a communicating part, and obtaining a client index by calculating the performance ranks in terms of the same dimension as the investment performance. An asset allocation part calculates investment allocations for each kind of investment in accordance with the client's performance ranks, and reports the investment allocations to the client through the communication part.