Abstract: A new problem of uncertain multi-attribute sequential group decision-making process was put forward and investigated with the interval number. A combinational interval number weighted average operator was built taking account of both characteristics of linear and non-linear operators. Aiming at the dependence of comprehensive evaluation results during information aggregation on aggregating path, an idea of multipath aggregation based on deviation reduction was proposed to provide three synthesis methods, i.e., the deviation minimization, reliability weighting and objective differentiation with the methods applied to the selection of different strategies of service innovation which is a problem being widely concerned about theoretically and practically, the validity of the methods is verified.