One of the most important sources for studying the social and cultural situation of Qajar Era is the travelogues written by European travelers. The objective of present paper is to study reaction of European travelers to the customs of Qajar Era, compare customs changes of that period with current Era and identify factors affecting custom changes trajectory. Moreover, it is assumed that some of the European criticizes Iranian culture when faced their customs. Customs related to celebrations and mourning are changed significantly since Qajar Era and it is known that social and political changes along with globalization issues are effecting evolution of customs. The method of collecting the data of this study is library method and is based on analytical and descriptive method. While identifying and introducing an 8-factor model effective on culture change, the important role of social and cultural changes and globalization in culture change and changes of customs has been confirmed.