This report deals with audiovisual and haptic interactive IP communications and estimates QoE in real time. For real-time estimation of QoE, we carry out regression analysis between QoE and application-level QoS and obtain equations for the estimation. We measured the application-level QoS and made a subjective experiment by assessing QoE multidimensionally with the SD method. To monitor QoE, we derive estimates for three QoE measures. We apply linear and non-linear regression analysis to the experimental results. As a result, we find that the obtained equations can estimate QoE with high accuracy. By using the equations, we have designed a multidimentional QoE monitoring system.