Material is the precondition for the implementation of building engineering project. Material procurement cycle and quality directly related to the progress and quality of building project, which is the effective protection of successful completion. Owing to many factors of uncertainty of decision-making environment and fuzzy thinking of decision-makers, the selection of building engineering supplier represents as group behavior selection process in fuzzy environment. Based on analysis on fuzzy group decision methods, the information representation method in fuzzy condition was introduced to present a kind of fuzzy information aggregation method. Application example of supplier selection of some building company shows that the method can reflect preference of enterprise on fuzzy and adequately consider each schema with proximity, which is a more practical approach for supplier selection.