This research discussed mainly on the volunteers' participating motivations at the National Science and Technology Museum. In the 316 valid questionnaires, most of the interviewers are long term volunteers who have been served at the museum for over 5 years. They are mainly 40 to 59 years-old housewives with religions who were graduated from high schools or over. The highest ranking of their motivations to join the voluntary services at the National Science and Technology Museum is ”the demand of the society” and the lowest ranking is the choice of ”accomplishing their own wills”.