With respect to the problem of multiple attribute decision-making, in which the attribute values are given in terms of intuitionistic fuzzy numbers, an intuitionistic fuzzy decision making method based on the projection is proposed and the calculation steps of calculation are given. As the first step, the projection values are calculated for multiple attribute decision making with intuitionistic fuzzy numbers between every alternative and virtual positive ideal solution and virtual negative ideal solution. Then relative membership degree to the virtual positive ideal solution and virtual negative ideal solution is further calculated to rank all alternatives according to the projection values. Finally, an illustrated example is in this paper shows the approach is simple, effective and easy.