Abstract: The approach of evaluating the age of human's wrist bones using pattern identification is a popular method in China and abroad. The accuracy of this method is greately affected by expert's experience, photogrammetric geometry and quality of X-ray films. In particular it may result in large difference of assessment of teen-agers. This article presents a new approach using X-ray photogrammetry to determine patial locations and size of wrist bones, considering the weights of various bones proposed by experts, employing linear regression to simulate the relationship between their lceations and dimensions and the age of wrist bones for integrated evaluation. 82 teen-agers were chosen as a sample to test the new method. The result of the test was desired.