Wooden materials used for storage and display of museum objects emit volatile organic acids which may damage the objects under certain conditions of humidity and temperature, so it is necessary to develop a method for analysis of volatile acids from wooden materials. Using solid phase microextraction-gas chromatography-mass spectrometry (SPME-GC/MS), volatile organic compounds were concentrated and analyzed. GC/MS was used to analyze the volatile organic acids semi-quantitatively. The types and quantity of volatile organic acids in nine kinds of wood were investigated. The results showed that the emissions of volatile acids from different woods are quite different. And all woods emit larger amounts of acetic acid than any other volatile acids. The results can be applied to the selections of storage and display materials in museum.