Abstract Background : Although many parents know that children have oral health problems, but the children 's oral health care is poor .Ministry of Health and Welfare grants free fluoride application every six months for preschoolers, but the utilization rate less than 7 %, indicating that there is still a very large room for improvement . Objective: To understand the difference between the extent of preschoolers using oral health services and their oral health, and to investigate the effects of related factors . Research Methods: A questionnaire survey of 300 preschool object. Surveying place for primary schools and kindergartens are in Taichung City , during December 2012 to January 2013 . Results:Through the analysis found that children fluoride group their oral health conscious is higher than those without fluoride Conclusion: The use of fluoride services on the overall health is significant, dental visits has big influence on fluoride services, although we are promoting our free dental fluoride application, but the effect is only about 7%, suggest future reserchers can put emphasis on the cause of low using rate.