The aim of this study was to explore preschool teachers' evaluation standards and searching strategies during their online searching process, focusing on the difference between pre-service and in-service teachers. A total of 408 pre-service and in-service preschool teachers in Taiwan participated in the survey research. The validity and reliability of the instruments were confirmed through factor analysis and Cronbach's alpha. The results showed that the in-service teachers adopted Deep Strategiesand all four kinds of evaluation standards (Multiple, Authority, Content, and Technical) more often than the pre-service teachers did.The results also showed that Internet experience may affect both pre-service and in-service teachers' use of searching strategies. The findings of this study suggest that more education on online searching strategies as well as evaluation standards should be provided for both in-service and pre-service teachers.