This study aimed to explore the science museum for Family-group visitors interaction between parents why their interaction is mainly divided into inquires the question, answers the question, discussion content, the operation taught and the onlooking exhibits showing,etc. five items measured. The author at the Science Center of National Museum of Natural Science for the study of the subject, the use of two-day weekend to take non-participant observation period, especially for Family-group visitors in all acts within the exhibit area to the observation, record, analyze and organize, through this research hopes to museum provides curatorial and exhibition planning reference. The study findings are as follows: (1) in inquires the question: The child visitor to asks exhibit the contents of the problems are the majority, the number of children accounted for 39.8% of the total interaction; parents to interact with the visitor, but only the total number of parents only 10.6% (2) in answers the question: Parents visitor to answer the questions raised and taught children, demonstration, accounting for the total number of interactions parents 23.9%; children's visitor on this project, children accounted for 20.3% of the total number of interactions (3) in discussion content: Parents percentage of the visitor and the visitor closer to children, parents, parents of the total visitor share of 18.4% of the number of interactions; children interactive visitor total number of children accounted for 20.5% (4) in the operation taught: Parents total visitor share interactions of 16.7%, accounting for children observation for 12.9% of the total number of interactions (5) in view show description: Parents are usually more visitors will watch or read the exhibit content description, representing the total number of interactions parents up 30.4%; children visitor is seldom watch their exhibit content description, only the number of children to interact with 6.5% of the total minimum.