As an inevitable result of social development, they speed up this process and also they have both possitive and negative effects. Since they are parts of social structure, such changes will be the mirror reflecting macro social chagnes. Their plentiful and diversified characteristics contributed to the identification of social changed of each country in recent time. In the situation of renewal, life-style difersification is neccessary and it would be considered as rule in any society. The problem is defining the level and evaluating political-social results, because this process has possitive factors beside its negative ones.