There are many genetic and environmental factors that affect cognitive development. Music education can also be considered as one of the environmental factors. Some researchers em-phasize that Music is an action that requires meta-cognitive functions such as mathematics and chess, and supports spatial intelligence. The effect of music on cognitive development in early childhood was examined with the Pythagorean Fuzzy Sets(PFS) method defined by Yag-er. In this study, PFS was created from experts’ opinions and an algorithm was given according to PFS. The results of the algorithm supported the data of the experts on the development of spatial-temporal skills of music education given in early childhood. In the algorithm, the ranking has been done with the Expectation Score Function. The rankings obtained from the algorithm overlap with the experts’ rankings.